Merge branch 'release/0.1' into develop
add necessary facilities for qr login.

remove code that no need any more for generating qr code
add an asynctask for qr login session authorization
remove ui items for qr code generating.
remove common-lang dependency.
add simulation for capturing qr code.
add authsession activity to confirm qr login.

rename main package to activity
add simulation for confirm auth operation.
update .gitignore.
update .classpath.
Merge branch 'feature/qr_login' into develop
bump version number.
refactor.

replace asynctask with handler
remove useless activities
remove simulation of capture and confirm auth
rename package activity to ui
rename mainactivity to homeactivity
improve stability.

restore zxing activities deleted in prev-commit
close httpclient whever excute method failed or not
add confirm auth task
move r.java from main to parent package
handle message from task_confirm_auth
Merge branch 'release/0.2'