preparations for loading data in async task inside vplan fragment
revert preparations
fix: the first two rows of vplan are statically skipped while parsing -> now this is done dynamically depending on content
save the id of today's vplan fragment and set it as current view in postCreate
added subject arrays for q11/12 and included them in filter settings screen
better filter distributing system and added integration of oinfo filters
display published timestamp and hidden item count on no data layout
change minsdk version and comment appmode functions out
added error messages for download errors and added viewpager setcurrentitem to onresume, bgparse postexecute and to filter activation
disable translation inspection for arrays.xml
deleted unnecessary usb storage permission; added clickable textview on main screen for use when there hasn't been any download yet; added alert dialog firing also through updateAvailableFilesList()
fixed filtering for oinfo, as the exact order of the filterstring must be given
fixed the display of today's vplan to display tomorrow's after 5pm, or, if it is friday, display monday's vplan