Refactor Rip::Compiler::Parser#reference_assignment to capture :lhs and :rhs
Change expectations to match reality
Refactor Rip::Utilities::Location to match Parslet::Slice terminology
Creating English without underscores
Normalize Rip::Compiler::Parser#reference_assignment
Parse property assignment
Refactor some test helper methods
Implement Rip::Nodes::Comment#==
Start constructing abstract syntax tree