Gister Versions Save

• When receiving 'Bad credentials' error message from the API, stop and notify user to re-init.
• Fix wrong version number reported by gister version.

• sync: Compare update time to skip already up to date repos.
• Use gsed and gdate on Mac OS X. Fix #14.

• redesign UI
• add init function
• replace fetch_list() with fetchall(), which fetches all your gists.
• improve documentation
• add support for Mac OS X and Cygwin

Thanks to wenLiangcan.