example of what a test file could look like
code to run tests in new json format
code to search directory for all json files/test collections
if a test fails on multiple assertions, show each of them
replace xml with json files
explicitly set Maze.start_ and Maze.finish_ to undefined before searching the maze for a start/finish
solution for 2_2 has extra forward block
made some of the blocks for 2_13 non-deletable to mirror real behavior
make sure we're validating something for each test
Merge pull request #380 from code-dot-org/levelTests

Better support for creating tests for levels.