AccessibleBlockly (#354)

* adding a folder in demos for blind and setting up the package.json file for development. Adding package.json to .gitignore

* removing gitignore~ file

* copied blind blockly demo code over. set up a new dev environment. Up for review: the blind blockly demo code. Much of the drop downs don't actually do anything, but a general look at the way angular is used would be helpful in shaping future development.

* adding an index file that was being ignored by .gitignore

* adding required angular files and libraries previously ignored by git add --a for some unknown reason.

* starting work on toolbox

* got workspace and toolbox connected. Copy to workspace annd copy to clipboard working at 80%.

* cleaning up autogenerated files

* adding my own files. Not sure why the test files are being added.

* cleaning up comments

* removed empty html_formatter.html file from project and put on git ignore list. The file is used on my end to help with formatting the html in javascript files.

* getting rid of unnecessary html_formatter file

* removing merge conflicts

* cleaned up comments

* cleaned up comments, organized file structure, made ToolboxXML a file that can be changed by other developers porting this code, added copyright and file summaries to js files, linted files, moved third party libraries to lib folder

* removing lint files that shouldn't be tracked.

* Made the clipboard a service instead of multiple pieces embedded within the app. Not sold on the name ClipboardService. Open to suggestions.

* syncing up demo updates

* adding insert block menus above and below appropriate blocks.

* hacky version of getting code to run.

* changing toolbox to be a menu. making both the toolbox and workspace ordered lists

* adding new folder dev-old containing a version of blind blockly that uses nested lists for the toolbox

* getting rid of menubar experiment

* adding treeview shenanigans part 1

* adding treeview experiment page and finishing up treeview.

* getting a treeview implementation working in the toolbox

* creating a fishfood folder for fishfood development

* making first level of fishfood

* fixing something

* adding index file for fishfood

* beginning merging the treeview system.

* creating two treeviews

* fishfood level 1 without working music blocks

* fixes to treeview navigation

* final fishfood features done

* adding support for toolboxes without categories

* beginning integration of Sean's new music code

* adding Sean's music blocks and beginning music_player integration.

* merged Sean's music block code into fishfood

* merged Sean's music code and fixed treeview bug with toolbox when no categories

* adding blank_demo

* fixing tab navigation.

* fixing bug with shift-tab. New bug found in alt+tab not opening dropdown?

* fixing labels

* fixing bugs and finding more.

* removing dropdowns in favor of buttons part 1. Still need to change field options.

* index.html for blank_demo

* beginning cleanup

* adding blockly- prefix to label ids.

* integrating AccessibleBlockly with Blockly library.

* remove closure library

* removing testing files that aren't in develop

* removing all demo stuff for a later pull request

* removing gitignore file that doesn't exist in developer branch

* syncing with develop branch files

* removing music files from this pull request

* doing some lint cleanup

* rolling back accidental package.json change

* removing var blocklyApp = blocklyApp || {} from each extraneous file

* adding last debug statement

* changed name of inputType function

* renaming _service arguments

* fixing function names

* fixing all comments.

* fixing minor comments

* renaming variables, etc

* fixing bugs that break demo. Adding the run code and clear workspace buttons back to the workspaceview as their current position breaks tab navigation.

* fixing minor comments

* fixing function names, etc.

* adding comments to getInputTypeLabel function

* removing addClass() calls from the template

* small change to clipboardService

* splitting getCategoryDependantId into two functions: getCategoryId and setActiveDesc

* fixing minor bug with last commit

* using conditional attributes to remove setActiveAttributes function from treeService and do same work in template.

* deleting unnecessary comment created in previous commit.

* adding a utilsService to remove duplicated code.

* changing function names in utilsService

* changing delete to [delete] to allow HTMLText functions to return an empty string instead of undefined. Also renaming concatStringWithSpaces to generateAriaLabelledByAttr

* generating ids in ngOnInit instead of on the fly, allowing us to use [attr.aria-labelledBy] in the template instead of using setLabelledBy(element). Deleting function utilsService.setLabelledBy.

* fixing small bug with tree service left arrow: was throwing an error when you can't go any further left.

* reformatting html to make it easier to read.

* moving from importing the xml file to using an xml toolbox in the demo.

* fixing minor bugs and removing code relevant only to the music game.

* minor fixes

* adding alerts to copy, paste, and mark actions. renaming blocklyApp.TreeView to blocklyApp.WorkspaceTreeView

* Beginning to add Blockly.msg strings.

* making sure index file is being tracked

* adding all demo bits

* removing demo files from this pull request

* fixing providers, some linting, and removing getInfo() function.

* adding small todo comment for sll@

* adding minimal Accessible Blockly demo

* removing demo: accidentally committed to wrong branch

* fixing Blockly.Msg string bugs

* fixing TODOs

* package file changed by an automerge. Changing back.

* addressing sll's comments. Creating shim for utilsService functions.

* fixing comments, changing fieldview to deal with this.field.

* fixing clipboard service bug

* fixing focus bug when editing a text input.

* fixed clipboard bug and added README

* fixing workspaceview not to implement on runCode() function and adding note to README

media/accessible.css

@@ -0,0 +1,9 @@
+.blocklyTable {
+  vertical-align: top;
+}
+.blocklyTree .blocklyActiveDescendant > label,
+.blocklyTree .blocklyActiveDescendant > div > label,
+.blocklyActiveDescendant > button,
+.blocklyActiveDescendant > input {
+  outline: 2px dotted #00f;
+}