Removes the maze reference
Adds lots of the blockly default blocks
Removes blocks that will never be needed for any core application
Some refactoring preparatory to using the clause system for
start conditions.
When you try to move but don't have enough power, it drains your
power to 0.
This refactor separates the idea of a boolean function factory
(which was previously called a clause manager) from that of a
declarative function executor.  A declarative function executor
takes a function that is declared in yaml (or, presumably, json),
goes through its list of implementations and constructs the
appropriate javascript function, and then executes that function.
The boolean function factory uses that capability to build a
boolean function out of clauses, and to setup callbacks that will
reevaluate that function as appropriate (exactly as the clause
manager did).

Still some work to do.  The next step is to create a separate
declarative function executor which will execute the starting
conditions for a scenario.
Implemented the start state parameter system, and provided parameters
for battery and RAM.  There's still an issue where the UI doesn't
update immediately when I set them, but other than that it looks
good.
Merge pull request #58 from virtual-world-framework/js-loop

Js loop
Removed generic vwf blocks, and commented out the help URLs
Defines the new repeat until goal block
Adds the new goal image, will need to be replaced
Adds the move until goal block
Merge pull request #60 from virtual-world-framework/googleRef

Removed generic vwf blocks, and commented out the help URLs
Merge pull request #61 from virtual-world-framework/goal-loop

Goal loop
Adds changed events for ram, ramMax, battery, and batteryMax
Refactors the generic blockly behavior and removes the no longer need rover specific behavior
Merge pull request #62 from virtual-world-framework/blockly-refactor

Blockly refactor
Removes some console output
Removes the DOD header
Add new terrain model and associated textures

Also, remove the scale that had been on the terrain for the previous version that was in units of cm.