Version v1.1.09

Version v1.1.08

Version v1.1.07

- minimum version updated to android api version 24

- update MainActivity screen
- add "Keep screen alive option"

- add disabled state style for buttons

- add stop server button
- add external storage permission (resolve vhqtvn#3)

- apply vsboot to all frames

- add some annotations to fix lints

upgrade gradle & change targetSdkVersion

Merge remote-tracking branch 'origin/master'

- integrate tmux

- fix crash