Added event handling in GUI thread.
https://github.com/openpeer/opandroid/issues/513
Merge branch 'feature-20140414-jni-refactoring' into feature-20140804-merge-threading
#514 all events from core should be on UI thread now
#514 synchronize access to cache and settings
add call in progress state string
fix npe in onRolodexContacts download and clean up threading code
comment out signout for now
disable settings delegate
#514 cleanup post to thread after merging in thread change