Wrong number of days in some months fix

Thanks to @ayemjay for fixing this. This issue could produce wrong parse results.

Release 0.1.3

No external changes just code refactor and preparation for crates.io

Release 0.1.2

• Simplify token_by_priority method
• Rename methods
• Add builder for parser
• Seconds must be equal to zero in results if opposite is not stated by user

Release 0.1.1

A lot of small fixes for rules and parser

Initial alpha release

0.1.0

Update Cargo.toml