Support for for..in loops for lists
Add tests for for..in for inline list literal and in block var decl
Merge pull request #111 from rapid-lang/for_loops

Support for for..in loops for lists
Merge remote-tracking branch 'origin/master' into control_flow

Conflicts:
	compiler/ast.mli
	compiler/ast_printer.ml
	compiler/generate.ml
	compiler/parser.mly
	compiler/sast.mli
	compiler/semantic_check.ml
	compiler/translate.ml