Adding classes to backend
Merge branch 'master' into racketbackend
Formatting and 80 chars
Putting set! back
Cleanup and floats
Add classes, object nesting, simplify envs
Adding blocks to backend
Merge remote-tracking branch 'origin/master' into racketbackend

Conflicts:
	.gitignore
	tests/001-010_tests.grace
Making merge work
Merge remote-tracking branch 'origin/working' into racketbackend

Conflicts:
	grace/lang/reader.rkt
	grace/lang/typecheckR.rkt
Output compatibility with parseR
Blocks and while-loops working
Allow blocks to take parameters
Clean up code, add simple errors
resolve merge with backend