Merge pull request #26 from dinhphamcao/master

add db
Add Listening Screen: Add audio player. Add handle player by Activity Lifecycle; Add comlumns to DB
Merge pull request #27 from HungTDO/develop

Add Listening Screen: Add audio player. Add handle player by Activity Li...
Add track info duration on Media player
Merge pull request #28 from HungTDO/develop

Add track info duration on Media player
Add selector for play button, Restart audio when click button Play
Merge pull request #29 from HungTDO/develop

Add selector for play button, Restart audio when click button Play
Add arrow for TUT
Merge pull request #30 from HungTDO/develop

Add arrow for TUT
ADd help icon, and modify arraw icon
Merge pull request #31 from HungTDO/develop

ADd help icon, and modify arraw icon
Add Help dialog, Add button help to title bar
Merge pull request #32 from HungTDO/develop

Add Help dialog, Add button help to title bar
Modify BIN
delete bin
Add Logo for Background, and random it
Merge pull request #33 from HungTDO/develop

Develop
Add icon to Header
Merge pull request #34 from HungTDO/develop

Add icon to Header
Add page status for Questions