Version 1.1: Feedback

This release incorporates feedback from the release announcement. The examples are slowly being expanded, some corner cases improved, and some new functionality for tricky parsing situations.

• Added simple support for enumerations, allow non-printable objects #12
• Added app.parse_order() with original parse order (#13, #16)
• Added prefix_command(), which is like allow_extras but instantly stops and returns. (#8, #17)
• Removed Windows error (#10, #20)
• Some improvements to CMake, detect Python and no dependencies on Python 2 (like Python 3) (#18, #21)