Dragging changes, rebased on develop (#1078)

* Add block drag surface translateSurfaceBy

* Add dragged connection manager

* Add gesture.js

* Add GestureHandler

* Implemented gesture skeleton

* Most basic workspace dragging

* Add dragged connection manager

* cleanup

* doc

* more cleanup

* Add gesture handler

* Add translateSurfaceInternal

* core/block_dragger.js

* cleanup

* Pull in changes to dragged connection manager

* Pull in changes to dragged connection manager

* comments

* more annotations

* Add workspace dragger

* Add coordinate annotations

* Start on block dragging

* Limit number of concurrent gestures

* Add some TODOs

* start using dragged connection manager

* Set origin correctly for dragging blocks

* Connect or delete at the end of a block drag.

* cleanup

* handle field clicks and block + workspace right-clicks

* move code into BlockDragger class, but still reach into Gesture internals a lot

* Clean up block dragger

* Call blockDragger constructor with correct arguments

* Enable block dragging in a mutator workspace

* Add workspace dragger

* click todos

* Drag flyout with background

* more dragging from flyout

* nit

* fix dragging from flyouts

* Remove unused code and rename gestureHandler to gestureDB

* Rename gesture handler

* Added some jsdoc in gesture.js

* Update some docs

* Move some code to block_svg and clean up code

* Lots of coordinate annotations

* Fix block dragging when zoomed.

* Remove built files from branch

* More dragging work (#1026)

-- Drag bubbles while dragging blocks
-- Use bindEventWithChecks to work in touch on Android. Not tested anywhere else yet.
-- Handle dragging blocks while zoomed
-- Handle dragging blocks in mutators
-- Handle right-clicks (I hope)
-- Removed lots of unused code

* More dragging work (#1048)

- Removed gestureDB
- Removing uses of terminateDrag
- Cleaned up disposal code

* Dragging bugfixes (#1058)

- Get rid of flyout.dragMode_ and blockly.dragMode_
- Make drags from the flyout start from the top block in the group
- Block tooltips from being scheduled or shown during gestures
- Don't resize mutator bubbles mid-drag

* Fix events in new dragging (#1060)

* rebuild for testing

* unbuild

* Fix events

* rebuild

* Fix up cursors

* Use language files from develop

* Remove handled TODOS

* attempt to fix IE rerendering bug, and recalculate workspace positions on scroll

* Rebuild all the things

* Comment cleanup; annotations; delete unused variables.

msg/js/bn.js

@@ -7,6 +7,7 @@ goog.provide('Blockly.Msg.bn');
 goog.require('Blockly.Msg');
 
 Blockly.Msg.ADD_COMMENT = "মন্তব্য যোগ করুন";
+Blockly.Msg.CANNOT_DELETE_VARIABLE_PROCEDURE = "Can't delete the variable '%1' because it's part of the definition of the function '%2'";  // untranslated
 Blockly.Msg.CHANGE_VALUE_TITLE = "মান পরিবর্তন করুন:";
 Blockly.Msg.CLEAN_UP = "Clean up Blocks";  // untranslated
 Blockly.Msg.COLLAPSE_ALL = "Collapse Blocks";  // untranslated
@@ -73,6 +74,19 @@ Blockly.Msg.EXPAND_BLOCK = "ব্লকটি সম্প্রসারিত
 Blockly.Msg.EXTERNAL_INPUTS = "বহি:স্থ ইনপুট";
 Blockly.Msg.HELP = "সাহায্য";
 Blockly.Msg.INLINE_INPUTS = "সারি ইনপুট";
+Blockly.Msg.IOS_CANCEL = "Cancel";  // untranslated
+Blockly.Msg.IOS_ERROR = "Error";  // untranslated
+Blockly.Msg.IOS_OK = "OK";  // untranslated
+Blockly.Msg.IOS_PROCEDURES_ADD_INPUT = "+ Add Input";  // untranslated
+Blockly.Msg.IOS_PROCEDURES_ALLOW_STATEMENTS = "Allow statements";  // untranslated
+Blockly.Msg.IOS_PROCEDURES_DUPLICATE_INPUTS_ERROR = "This function has duplicate inputs.";  // untranslated
+Blockly.Msg.IOS_PROCEDURES_INPUTS = "INPUTS";  // untranslated
+Blockly.Msg.IOS_VARIABLES_ADD_BUTTON = "Add";  // untranslated
+Blockly.Msg.IOS_VARIABLES_ADD_VARIABLE = "+ Add Variable";  // untranslated
+Blockly.Msg.IOS_VARIABLES_DELETE_BUTTON = "Delete";  // untranslated
+Blockly.Msg.IOS_VARIABLES_EMPTY_NAME_ERROR = "You can't use an empty variable name.";  // untranslated
+Blockly.Msg.IOS_VARIABLES_RENAME_BUTTON = "Rename";  // untranslated
+Blockly.Msg.IOS_VARIABLES_VARIABLE_NAME = "Variable name";  // untranslated
 Blockly.Msg.LISTS_CREATE_EMPTY_HELPURL = "https://github.com/google/blockly/wiki/Lists#create-empty-list";  // untranslated
 Blockly.Msg.LISTS_CREATE_EMPTY_TITLE = "খালি তালিকা তৈরি করুন";
 Blockly.Msg.LISTS_CREATE_EMPTY_TOOLTIP = "পাঠাবে একটি তালিকা, দের্ঘ্য হবে ০, কোন উপাত্ত থাকবে না";