Updating wiki links.
Remove Puzzle app (now in Blockly Games).
fix: unit tests were using strict equality testing for numeric results. Modified to check for 15 decimals of precision. Now the exp unit test passes.
Move Block Factory from apps to demos.  Add icons to demos.
Move closure-library-read-only to closure-library (due to the Closure project's move).
Add help button to Block Factory.
Detect old Closure directory and prompt to rename.
Merge pull request #2 from yoyoyvr/dev.unit-test-precision

fix: unit tests were using strict equality testing for numeric results; now check 15 decimals
Fix parasitic transitivity of setPreviousStatement and setNextStatement.
Recompile.
Improve Python compatibility of build file.
Add 'media' config option.  Deprecate 'path' config option.
Sound URLs now relative to page, not media directory.
RTL demo now in Arabic instead of English.
Add starting blocks to JS generator/interpreter demos.
Fix Block Factory when types are saved.
Initial version of simplified Graph demo.
Completed Graph demo.
Redirect Maze and Turtle to Blockly Games.  Redirect Graph to demos.
Localisation updates from https://translatewiki.net.