Update of greek translation 

Last greek update containing latest new entries and a few corrections of past ones
Update res/values-fr/strings.xml
Better style the thread count indicators
Tighten up some of our english language prose
reorder folder list menu to emphasize useful things a bit more
Hide the threaded view wrapper to get slightly better spacing
more wordsmithing
Bumped manifest to 4.314
Bump to current releases of ABS and PTR
Kill our use of submodules dead. They're too painful for new contributors
Check in ABS 4.20 and PTR 1.4.2
remove submodule code from build.xml
more string tweaking
Bumped manifest to 4.315
make the checkmark a little wider.
Don't use FLAG_ACTIVITY_SINGLE_TOP to start MessageList

We currently don't implement onNewIntent() so using
FLAG_ACTIVITY_SINGLE_TOP won't work.
Fix "Notification opens unread messages"
Don't use LocalSearch object in launcher shortcut intents
IntellIJ IDEA: Project fixes for submodule removal, add android support jar as compile time dependency, and various other IntelliJ-specific build fixes.
Two typo fixes from zjw