Ignore vendor dirty git modules.
[fix bug 845717] Remove region field when empty.
 [Fix bug 836981] Remove WebTrends add Google Analytics
[fix bug 849795] Fixed commenting on reports for Mozillians group.
[Fix bug 761559] Implement multiple event iCal export

* Implement client side key/value url handling in events page
* Implement iCAL API serializer
* Add regex to handle events urls
* Add template to generate multiple event iCal
* Add button to export iCAL in events list
* Add test to multi event iCAL export
Multiple fixes