Add for and while loops to parser
Change how blocks are output in mc2c, and include cross-compiled test program in Makefile.
Add parsing of structs
Cross-compiler now understands structs, while loops, and for loops.
Add a linked list test program
Add some more comments to the lexer and parser.
Update cross-compiler to work with latest rustc.
Add enums to the parser.
Add 'match' statement to parser.'
Add deconstructing of tuples with 'let' in the parser.
Update tests for new version of rust.
Refactor mc2c functions to return strings instead of printing.
Add preliminary support for enums and pattern matching to the cross-compiler.