* Fix error conditions for setParent #4989
* Error now thrown when calling `a.setParent(b)` on non-null b if the output/previous connection of a is not connected to an input/next connection of b without removing block from old parent's child list.
* Commented out error for when calling `a.setParent(null)` if a is connected to superior block.
* Adjusted comment to reflect that blocks were no longer being disconnected in this method.
* Also changed == to === per #4924 (`newParent` and `this.parentBlock_` must both be instances of `Blockly.Block`).
* Fix error conditions for setParent #4989
* Error now thrown when calling `a.setParent(b)` on non-null b if the output/previous connection of a is not connected to an input/next connection of b without removing block from old parent's child list.
* Error now thrown when calling `a.setParent(null)` if a is connected to a superior block.
* Adjusted comment to reflect that blocks were no longer being disconnected in this method.
* Also changed == to === per #4924 (`newParent` and `this.parentBlock_` must both be instances of `Blockly.Block`).
* Fix error conditions for setParent #4989
* Error now thrown when calling `a.setParent(b)` on non-null b if the output/previous connection of a is not connected to an input/next connection of b without removing block from old parent's child list.
* Commented out error for when calling `a.setParent(null)` if a is connected to superior block.
* Adjusted comment to reflect that blocks were no longer being disconnected in this method.
* Also changed == to === per google#4924 (`newParent` and `this.parentBlock_` must both be instances of `Blockly.Block`).
* Fixed lint errors.
* Fix error conditions for setParent google#4989
* Error now thrown when calling `a.setParent(b)` on non-null b if the output/previous connection of a is not connected to an input/next connection of b without removing block from old parent's child list.
* Commented out error for when calling `a.setParent(null)` if a is connected to superior block.
* Adjusted comment to reflect that blocks were no longer being disconnected in this method.
* Also changed == to === per google#4924 (`newParent` and `this.parentBlock_` must both be instances of `Blockly.Block`).
* Fixed lint errors.
* Adjusted comment.
* Removed unnecessary set to null/added tests
* One is failing (commented out), will investigate later
* Lint fix
* Removed failing test that correctly fails
* Update comments to conform to style guide
Capitalize first letter, period at end
* New gulp task buildDeps (npm run build:deps) to create tests/deps.js.
* Old gulp task buildUncompressed is deleted.
* blockly_uncompressed.js is now handwritten.
* And simplified; in particular, BLOCKLY_BOOT is gone.
* And linted!
* For consistency with the Closure documentation and base.js,
consistently refer to what blockly_uncompressed.js is used for as
"uncompiled mode" rather than "uncompressed mode" (but don't yet
rename it to blockly_uncompiled.js)
Unlike goog.provide packages, goog.module modules are loaded using
XMLHttpRequest in uncompiled mode. Because browsers treat file: URLs
as each being a separate, unique origin, this means that CORS rules
prevent goog.module modules being loaded from a file URL.
To work around this, use the http-server npm to serve the repository
root directory on localhost:8080.
Provide a script so that you can type `npm start` to start the local
http server and automatically open a browser window pointing at
tests/playground.html.
Modify the setBackgroundColour function in the playgrounds to provide
the usual lilac background on locahost URLs and a sickly green one
if using a file: URL, all of which will soon stop working.
(The background doesn't actually appear to be visible in the advanced
playground.)