move share button out of option menu into action bar, fixes #15. Also use modern version of icon.
Add action_new icons, add sparse menu with action_new and option menu,
use it in CellActivity. Part of fix to #6.
add sparse menu to CellListActivity
add check for null groupsCache, fixes #18
set intent flag CLEAR_TOP to fix issue #20
clean up some unused code
add edit cell dialog for title/description on long click; resp. setters
in CellCollection; long click handler in CellListFragment. Fixes #3.
attribution, debugging
title string of edit dialog was missing
class javadoc
add group field to edit dialog; its handling analogous to new cell
dialog
in title of cell display, show "groupname • cellname" instead of
cellname only
let CellGroupsFragment listen on any GROUPS_CHANGED broadcast; send that
from switchGroup().
we save cell data now only 1. on startup while creating group list, 2.
when new input was processed in a cell, 3. on adding, removing cells, 4.
after editing cell metadata. this is one part to ensure fixing #17
ditto
use asynchronous I/O for file saving, this apparently is needed to fix
#17
Merge pull request #23 from rwst/dev

further improvements, fixes