refactor : do not use MainWindow*.xib
updated
merge master
update bell sound
bug fix: time set 24h problem
update font max size
add vibration permission
update ChangeLog : android v1.1
support gradle
fix directory layout for gradle.
update gradle config
remove eclipse configs
iphone -> ios
Merge branch 'master' into develop

Conflicts:
	android/.gitignore
	android/presentationTimer/proguard-project.txt