combine ListFragment,Loader,ListAdapter together

change the default path  to "/"
longclick to choose file or directory
add a menu to select a directory,use ActionbarSherlock
add selectMode

use FileUtils.setSelectMode to determine file or directory to select
modified the example
Multi File Chooser
Multi File Chooser new library usage
add modification from liukaixuan (mimetype zip)
merge wangqi modification
fix and revert incompatible changes
fix merge multi file select from Perseverance
add filter on extension from Ravenfeld
fix file selection with list empty
fix file selection with list empty
fix
Merge branch 'merging_branch' of https://github.com/letroll/aFileChooser into merging_branch