Grammar overhaul
Changed grammar. Now uses whitespace blocks.
Changed example to fit the new grammar.
Removed EOS from grammar. Now using () to distinguish actions
Added numbers to the grammar.
Removed null tokens from end of blocks
Added non-minified ANTLR js file
Cleaned up grammar a little
Added basis for atype checker. Doesn't check types yet.
Type erros are now thrown. Types are not propogated yet.
Changed level token text.
Updated ACTION tokens to include line numbers and text
Added Type error messages.
Updated git ignore
Added 'new' keyword
Added type checking.
Simplified Tree Grammar
Simplified TYPE rule.
Added new evaluator. Still a work in progress.
Added functionality for the set action