Added support for https and basepath parameters for youtrack.

The script now supports the environment variable `HUBOT_YOUTRACK_URL`
which has to follow the format:

    <scheme>://<username>:<password>@<host:port>/<basepath>

The basepath part is optional. If the variable is not set the old
variables of the script are used. Therefore there should be no migration
issues.
Add ability to ignore users before processing issue link.
Merge pull request #1099 from bdruth/feature/Add_ignoreUsers_github-issue-link

Add ability to ignore users before processing issue link.
Remove backticks from the keep-alive commands

Users were confused by the backticks and using them when adding URLs for Hubot to keep alive. I don't think they add much value or make the commands any clearer, so I've removed them.
Tighten up the replies for the keep-alive script

Simple formatting changes like capitalizations, question marks and removing additional lines from the output.
Merge pull request #1100 from jhubert/update-keep-alive-docs

Small updates to the keep alive script
Update random-user.coffee with new API syntax

As suggested in #1101
Removed regular expression and use url.parse for the url.

Fixed a small bug regarding the path in `askYoutrack`.
Merge pull request #1102 from spajus/patch-1

Update random-user.coffee with new API syntax
Merge pull request #1098 from jan0sch/youtrack

Added support for https and basepath parameters for youtrack.