Refactor Rip::Compiler::AST to inherit from Parslet::Transform
Rip::CLI#{parse_tree,syntax_tree} to allow reading from standard in
Merge Rip::CLI#{parse_tree,syntax_tree}
Add description for --tree option
Add -t alias for --tree
Stop supporting all the things
Remove " and exit" from command-line descriptions
Try to be explicit
Improve command-line interface