initial commit
removed bad import
gitignore .pyc
added hints for parsing tests
explicit ordering of tests in run-tests.sh
renamed repl
changed to only one call to nosetests
added more comments for some tests
removed requirement that 'eq' only works on atoms
fixed typo
added test for math op argument types
ordering of environment-tests
fixed broken test. derp.
added tests for variable bindings
Info about parsing in README
renamed Lambda -> Closure
added a few test comments
split ast helper functions into separate module
tests for defining and calling functions
tests for list related functions