Major reorganization of view/model interactions.

Mostly, the inheritance graph for MessageRecord/MmsMessageRecord was
all messed up, and each class was overloaded for things it shouldn't
have been.

1) Broke MessageRecord/MmsMessageRecord up into: DisplayRecord, ThreadRecord,
MessageRecord, SmsMessageRecord, NotificationMmsMessageRecord, and
MediaMmsMessageRecord.

2) Updated all the adapters/views to keep pace with that change.

src/org/thoughtcrime/securesms/contacts/ContactIdentityManagerICS.java

@@ -48,6 +48,7 @@ class ContactIdentityManagerICS extends ContactIdentityManager {
     return true;
   }
 
+  @SuppressLint("NewApi")
   @Override
   public List<Long> getSelfIdentityRawContactIds() {
     List<Long> results = new LinkedList<Long>();