fix get photo path from external SD card #140
fix #139
fix #150
Merge pull request #152 from Logan676/bug

fix Images being uploaded over 4G even with "Wifi only" selected #150
Merge pull request #149 from Logan676/uphome

fix actionbar home up button in AccountDetailActivity does not work as expected #139
Merge pull request #148 from Logan676/camera

fix get photo path from external SD card #140
mark code that need improvement with "XXX"
fix camera photo upload cancell all error

only cancel camera upload tasks exclude other file upload tasks  when user stops camera upload service
code cleanup
code refactor