Tracking issue for new release

[NeilFraser]

This bug is to keep track of issues involving the next release of Blockly Games. This is a fairly light-weight release, with most of the problems originating from changes to the Blockly codebase.

Main features:

• Insertion markers when connecting blocks.
• Four new languages: Basque, Armenian, Interlingua, Urdu.
• Movie level two was missing a block in toolbox.
• Dialog issues in JS levels of Pond (possibly only in uncompiled mode?).

Upstream Blockly issues:

• [x] https://github.com/google/blockly/issues/2217 Insertion markers strobe when snap radius is increased.
• [x] https://github.com/google/blockly/issues/2216 Maximum Block Limit demo off by one.
• [x] https://github.com/google/blockly/issues/2215 Colours on advanced compilation demos are all black.
• [x] https://github.com/google/blockly/issues/2236 workspace.getAllBlocks shouldn't return insertion markers by default.
• [x] https://github.com/google/blockly/issues/2277 Mutators appear under toolbox

Blockly Games issues:

• none

[NeilFraser]

Pushing new version now...