Added help blocks.
TODO: Set different colors for different libraries.
Added keys API.
Added VarArgsBlock.  So far, only tested with blocks-test.
TODO: Code generation and more testing.
Changed moveNumberedIndexBefore() to allow placing input at end of list.
Allow var args inputs to appear anywhere relative to other inputs.
Added two textutils blocks.
Changed how interpolateMsg() decides whether to inline inputs.
Combined some textutils blocks.
Added Vector API.
Added clone methods to all of Blockly.Field*.
Fixed typo.
Cleaned up Lua code generation.
Made use of Field.clone().
Added Blockly.ComputerCraft.ControllingInputCodeGenType.
Other minor improvements.
Added support for arbitrary Fields in VarArgsBlock.
Minor name changes.
Added missing addChild attribute for textutils_format_time.
Now have all OS functions.
Lifted out and simplified Blockly.ComputerCraft.convertFromCamelCase.
Rewrote colour palette names (e.g., colour.pink) instead of numbers.
Added colour selector by name.
Added remaining blocks from colour API.
Added VarArgs.generateLua_ to put var args at the end of the parameter list.
Merge remote-tracking branch 'upstream/master'