Alerts Scheduler Duplicates

* Cache lock mechanism had a flaw
* Destructor killed the cache which is not supposed to happen - it's supposed to expire on its own [doh] :bomb:
* Using 5 mins instead of 15
* closed #71
Merge pull request #114 from dkobia/master

Fixing Issue with Alert Duplicates
Alerts Page Cleanup

* Trying to clean up styles on alerts page
* Sadly used inline styles for now :[
* Moved the finder location box a few pixels down so that slider tooltips are not covered up
* closes #34
Added soundcloud plugin
Merge pull request #115 from dkobia/master

Alerts Page Cleanup
Style admin report search
Merge branch 'master' of github.com:ushahidi/uchaguzi
Add revision module (with uchaguzi fixes) and add core hooks needed