add front code
xiao commit the UI
add ConversationId and insert message in DB and build the new page
change the DB complete the jumpturn from welcome to main and the jumpturn from conversation to record
complete the rest jumpturn and change the DB a little
complete the conversationList
change the db and change the main UI
the new main view and the conversation view and the conversationList view and the personal information view and the contacts information view
Merge branch 'front' into develop
Merge branch 'develop' of https://github.com/lao605/zzc into develop
Merge branch 'front' into develop