COMPLETE RESTART OF PROJECT
created listview item layout for handsets, added pager title strip
added logo in actionbar
removed unnessessary ldpi images
merged activities to single one for phone and tablet
	- overwritten layout file
	- ViewPager on phone
	- different fragments to use available space
	- extra headline on tablet
integrated pull-down-to-refresh pattern
implemented simple data model to maintain records of last few days
added dropbox API and implemented download of data from cloud
bugfix to prevent user from triggering refresh when another refreshing
is active