Initial release

This is an initial release of GitHub Labelbot. It might be buggy and available features are limited.

Supported options

-t, --token-file PATH - file containing GitHub token information
-u, --rules-file PATH - file containing issues labeling rules
-i, --interval INTEGER - time interval in seconds in which to check issues
-d, --default-label TEXT - default label to use after no rule is matched
-c, --check-comments - flag indicating comments should also be checked
-s, --skip-labeled - skip labeling issues that already have any label
--help - Show this message and exit.