Add deps and build-deps to info.rkt

This is important for people using Racket 6 with less than the full,
main distribution.
Merge pull request #27 from greghendershott/add-deps-to-info-rkt

Add deps and build-deps to info.rkt
basic scheme parser with tests
update comment
whitespace cleanup
more whitespace cleanup
Merge pull request #28 from neomantic/scheme_parser

Scheme parser
in scheme parser example, preserve src loc in check-parse-exn
fix triple quote test in scheme parser example
add scheme parser to run-all-tests.rkt