Remove invoke shower.showPresenterNotes() in enterSlideMode because it already invoked in shower.go()
Rename: innerNavigationCompleted -> isInnerNavCompleted
Refactoring: shower.increaseInnerNavigation() returns only Boolean
Refactoring keydown listener PgDown/Down/Right/l/j
Fix for presenter notes, fix timing for inner nav; Refactoring.
Merge pull request #112 from miripiruni/master

Refactoring, fix for presenter notes, fix for inner nav timing