Register a macro and lay down the basic of the PEG grammar, only the parsing of rule definition of the form IDENT = match_me are done.
Add missing license headers.
[Grammar] Match string literal.
[Grammar] Add the DOT, it matches any single character.
[Parser] Support partial matching.
[Grammar] Must declare the grammar by giving it a name.
[Grammar] Add support for expression inside parenthesis: .
[Grammar] Add support for multiple rule definitions.
[Grammar] Add support for sequencing rule atoms (SequenceExpr).