progress bug
Delete the progress bar.
Refactor Chat Adapter.
Merge branch 'dev_rft_adapter' into dev_rft_ui
process chat message item click event.
Implemented history file deleting.
Merge branch 'dev_rft_ui'

Conflicts:
	Share/src/com/michelle/share/ChatActivity.java
	Share/src/com/michelle/share/ChatAdapter.java
Progress Bar issue.