BlockList added
Merge remote-tracking branch 'upstream/master'
Testing:Removed three entries
Testing: Added three entries
Blocklist added to res
Merge remote-tracking branch 'origin/master'
Downloads new Blocklist if any changes have been made
Methoda add for getting and setting the SHA in Prefs
Test file for BlockListDownloader
ScrollView added
Strings for activity_about.xml added
activity_about.xml made more consistent
The download link modified to Mozilla repository
Merge branch 'master' of https://github.com/anishgkanchan/MozStumbler into issue-621

Conflicts:
	res/layout/activity_about.xml
Merge fixes