Initial NavigationGroup implementation
added modal option to nag group
Moved NavigationGroup to root directory
Merge branch 'refs/heads/master' into timob-12295

Conflicts:
	src/tibb/tibb.pro
Navigation Setters and Getters
Merge branch 'refs/heads/master' into timob-12295

Conflicts:
	src/tibb/TiUIObject.cpp
Merge pull request #69 from pec1985/timob-12295

[TIMOB-12295] Initial NavigationGroup implementation