put match into own function.
started adding API description to README.
updated example.
example update.
example updated again.
restructuring querybuilder and creating lots of tests.
in the middle of testing group. there's a problem with the nesting.
added agg and more tests.
more tests, more querybuilding. still needs tests for some of the _compileX methods, and end() is not fixed yet.
added more tests for _compileGroup.
added code and tests for _compileRename
added _compileUnwind and tests.
added sort and limit compiles and tests.
all tests and methods done.
first attempt to implement nesting. doesn't nest sort / limit yet. need a more holistic approach.
moved _compileUnwind stage to the end, because other stages add to unwind.
added more complex example in index.html
0.2.0