Trello + Firefox + Scriptish adjustments and switch to RHBZ

* Made badges clickable
* Open a new tab instead of opening the link in the same window
* Adjusted 'Bug \d+' syntax to configurable variable and now using BZ#\d+ by
  default
* Removed the '<a>' tag and replaced it with jquery click
* Click handler prevents now the event propagation so nothing else but this
  is handled (not opening the card)
* Adjusted trello url to https://trello/b/* instead of http:/trello/board

Signed-off-by: Vinzenz Feenstra <vfeenstr@redhat.com>