SIM card change detection feature added. emails added. Ringer dismiss activity added. Code Refactoring.

closes #7.
Added logic to detect sim status on boot up and on fresh install
Added email tamplate to send sim change email
Added email tamplate for low battery email
Added divice unique ID to email
Added preference for recording sim serial number from user
Closes #13. Added preference for increasing the phone ringer volume
incrementally (not done)
Added email return values (not done)
Closes #12. Added activity to dismiss phone ringing when sms is
received. This works even with phone is in on/sleep/locked state
Closes #11. Refactored worker thread to maintain bundle queues instead
of interger queues.
Refactored different keys for different security actiions into one
single key
Added test button on home activity for debugging purposes.

Files added:
SimManger.java
DismissRingerActivity.java

Files Modified: Constants.java
account_prefs.xml
SecureApp.java
AndroiodManifest.java
BootReceiver.java
SMSbroadcastReceiver.java
PhoneRinger.java
strings.xml
prefs_settings.java
prefs_accounts.java