Port rd_parser (Recursive Decent Parser) #2

We need to port JavaScript Module to Java
https://github.com/SimplePEG/JavaScript/blob/master/src/rd_parser.js

I highly recommend to do write tests for each and every method (it will help a lot)
https://github.com/SimplePEG/JavaScript/blob/master/test/rd_parser.combo.spec.js

To make RD parser work we need to write:

• get_last_error
• string
• regex_char
• sequence
• ordered_choice
• zero_or_more
• one_or_more
• optional
• and_predicate
• not_predicate
• end_of_file
• rec
• action
• call_rule_by_name

PS: WARNING - JS, Java, Python and Go version should behave the same, so if you spot problems in code don't fix them, create an issue in SimplePEG/SimplePEG