Made code generation order depend on info.args for ValueBlock and VarArgsBlock.
This let me eliminate the unneeded parameterOrder field.
Renamed  the "colour" API to the correct "colours".
Added field varArgsTitle.
Added shell.run.
Removed reference to deprecated type 'Time'.
Added tooltips to var args blocks.
Lifted out addVarArg.
Improved comments.
Abstracted out Blockly.ComputerCraft.disallowArgTitle_.
Made minor improvements to comments.
Added rednet API.
Moved SIDES_ from blocks-rednet.js to Blockly.ComputerCraft.SIDES
for future addition of blocks-redstone.js.
Fixed Lua generation of parameters.
The earlier version conflated titles (specifically, Blockly.FieldDropdown)
with inputs and did not do the correct thing when parameters needed to be
reordered.  The bug was found when I added a block with two dropdowns and
no value input.
Added Redstone API.
Fixed blocks that change outputs by adding and using
Blockly.Block.prototype.changeOutput().
Cleaned up ComputerCraft.Block inheritance.
Improved comment.
Folded ExpStmtBlock into ValueBlock.
This enable turtle_place to be both exp/stmt and have a dependent input.
TODO: Update comments.