build up database connection
Minor changes
refreshing views added
- implements query (for detail view) and update in LessonProvider
- implements display of existing lessons
- implements updating of lessons
Important changes in EditFragment
start implementing fragments
New classed added
Begin adding Fragment support for tablets
Fragments realized
Merge remote-tracking branch 'remotes/origin/NoContentProvider'

Conflicts:
	bin/classes/de/wvsg/lessonrateapp/LessonEditActivity.class
	bin/classes/de/wvsg/lessonrateapp/LessonEditFragment.class
	bin/classes/de/wvsg/lessonrateapp/LessonListActivity.class
	bin/classes/de/wvsg/lessonrateapp/LessonListFragment.class
	bin/classes/de/wvsg/lessonrateapp/LessonProvider.class
	bin/classes/de/wvsg/lessonrateapp/R$id.class
	bin/classes/de/wvsg/lessonrateapp/R$layout.class
	bin/classes/de/wvsg/lessonrateapp/R$menu.class
	bin/classes/de/wvsg/lessonrateapp/R$string.class
	bin/classes/de/wvsg/lessonrateapp/R$style.class
merged branches