adding support for Bitbucket issues with tests + small fix for gtalk icon

Conflicts:
	Gemfile
	app/assets/images/gtalk_inactive.png
fix for ruby 1.8.7
another fix for 1.8.7
Merge branch 'master' of https://github.com/errbit/errbit into adding_support_for_bitbucket_issues

Conflicts:
	Gemfile
adding support to gtalk notification
adding links to gtalk and campfire if they are configured
small change in error
Merge branch 'master' of https://github.com/errbit/errbit

Conflicts:
	Gemfile
	app/models/notice_observer.rb
	spec/fabricators/notification_service_fabricator.rb
reset a problem's notice count when it is reopened (by a notice) not when it is resolved
add a spec asserting that resolving a problem doesn't reset its notice count
backtrace extraced to it's class
1.8 syntax
added support to change the branch name for backtrace links - default to master
Merge branch 'master' of https://github.com/errbit/errbit into adding_support_for_bitbucket_issues
fixing the spec for bitbucket issue tracker
Allow unneeded gems to be removed to disable the corresponding issue tracker, notification service, or authentication provider
add BacktraceLine#fingerprint
add ExtractBacktraces migration
adding support for hoiio sms notification service - issue #148
Merge branch 'master' of https://github.com/errbit/errbit into issue_148