Add configurability and JIRA version creation/release

Added a bit of configurability to make it easier to test the bot on a different network or in a different channel. Also added two methods for working with versions on JIRA. createVersion allows a valid user to create a version in JIRA, releaseVersion allows a valid user to mark an existing version as released.
It could be swapped so that the class field was chan and the parameter was channel. I can do it if you want me to make that change.