Adding support for threads

Updated botkit library to add support for threads

Footer

Added new footer to response

Moved JIRA formatting to external library

Moved JIRA formatting to external library

Direct Mention gets full format

When a user directly mentions your bot, it will use the full format regardless of global setting.
ex. @bot FOO-123

Bugfix: Stikethrough matching

Added 'm' to regex to support multiline.

Bugfix: Dashed UL and better Strikethrough

Fixes for #16 by adding support for dashed unordered lists
I also fixed a bug in Strikethrough formatting that was making it too greedy

Support for JIRA formatting

Added translations to convert JIRA formatting to Slack where supported.

Library Migration

Migrating Node JIRA library to a more updated version.

Converted regex to string for docker consistency

Updated the regex value to use a string instead of raw regexp for docker consistency

Bugfix with Jira Lib

They haven't updated the NPM version of node-jira, so I need to revert back to my fork