jsdoc3/jsdoc#332 : added ability to define multiple tutorials' information in one file
added tests for tutorial/resolver. A bit of renaming needed to ensure all test tutorials had unique names
added tests for Tutorial class.
Made Tutorial#addChild and Tutorial#removeChild modify the child's parent (as well as the parent's children property)
test improvements: expect(X instanceof Array) --> Array.isArray(X), some toEqual -> toBe, .indexOf(X).not.toEqual(-1) --> .toContain(X)
fixed typo in test, also Array.isArray instead of instanceof Array
Merge pull request #334 from mathematicalcoffee/feature-multi-tutorial-json

#332: Allow master configuration file for all tutorials
Merge pull request #335 from mathematicalcoffee/tests-tutorial

added tests for Tutorial class.
document OS X fix for bad Rhino version (#340)