fix error when delete account
add progressbar to AccountDetialActivity
Merge pull request #137 from Logan676/progressbar

add progressbar to AccountDetailActivity
add menu layout to specifically target 480dp width screen
fix get photo path from external SD card #140
Merge pull request #138 from Logan676/multiple_menus

fix multiple menus error #121
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
Revert "Merge pull request #148 from Logan676/camera"

This reverts commit 6e3fb44e56d331ba3aca0166afbaa598e5d585d5, reversing
changes made to 43535712ba5c47649a0a14ac8cb49d2ff8e38f95.
apply Guava's static collections utilities
Merge pull request #160 from Logan676/guava

apply Guava's static collections utilities
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
show certificate warning details #142
Merge pull request #146 from Logan676/haiwen/review

resolve review tickets