TODO: QuestionAct
add list fragment into QuestionAct
add action bar tabs
add RequireLoginDialogFragment
merge master
rename package Utils to utils
bind click to register button
get pending questions
adjust row_pending_questions
lock question
AnsweredQuestionAdapter
getAnsweredQuestions
fix log
fix
add library:gstone_common
ChatAct
getMessages
bind click to QuestionAct items
display chat messagres
merge gzc