Fix conversation list view for larger text sizes.
Modify string tag.
//FREEBIE
Fix locale when using country codes.
Also check cc for duplicates
Merge pull request #1140 from psm14/bugs/group_mms_local_number

Also check cc for duplicates in group MMS
Merge pull request #1076 from phenx-de/fix-big-fontsize

Fix conversation list view for larger text sizes.
more precise sms controls
// FREEBIE
Merge pull request #984 from mcginty/sms-prefs

more precise sms controls
Don't block UI while loading the contact list. Added a simple ContentProvider for push contacts.

Up to now, we did the loading of the contact list in a strange way:
   - Contacts from the phone's address book were retrieved using a background loader (good, does not block the UI thread)
   - (Push) Contacts from our database were loaded in onLoadComplete(), i.e. in the UI thread, blocking it.

In a perfect world, every contact would also be a push contact, i.e. loading the push contacts would take just as much time as loading the "normal" contacts. I rebuilt this so that everything is being loaded in a background thread.

For this, there were two possibilities: Either build a custom loader to retrieve stuff from the database into a cursor, or build a custom ContentProvider and use CursorLoader. Both seemed almost equally beneficial, but perhaps we can make additional use of that ContentProvider some time in the future (see for example #890), so I decided to go with that one.
Adding option to hide non-Push-Contacts. This fixes #664 (partly, see below)

I did not yet have a look at the other lists where contacts are listed, but I guess this one is the most important one. If we want this, I'll do this with all the other lists, too.
Depend on sms preferences