multiscreen 1.2.0

Support multiscreen(different resolution and size of display) for mobile application.

##1.2.0 support rotate screen

##1.1.0 change how to use.

##1.0.6 remove Singleton.

##1.0.5 update gradle

##1.0.4 fix conflict

##1.0.3 update gradle and kotlin

##1.0.2 update gradle and kotlin

##1.0.1 add readme and example code.

1.0.0

Release First version.