Merge pull request #1 from vishal0071/master

Fix for sort dialogInterface
Added history feature

still wip
improved history feature

still wip
Fully implemented history  feature
Added Some Strings
nothing
Fixed Contextual Action bar
Fixed Contextual action bar
Minor changes

*button bar scrolls to right automatically
*removed  gallery
Merge pull request #2 from vishal0071/master

Import RootTools jar
testing root
Fully working root directories browsing like(/data)

still needs more work.
minor improvements for root browsing

still wip
Improved Root browsing

confirms that command is completed, only after that, list is loaded
minor improvements
Fixed an fc,and resized drawables
Reformatted Code and Optimised imports

More readable code
Added root preferences and fixed a memory leak

Root preferences are wip
Fixed an fc due to previous commit
Separated Asynctasks