Added passcode settings
Added passcode lock screen
Added soft numeric keyboard
Enhanced passcode lock screen
Closed #39. Implemented passcode lock screen feature
Added support for older devices
Prevent from enabling passlock without entering a passcode
Implemented the passcode lock with handling resuming
Support for zipped xml file

Will automatically detect if the file is zipped or not
Bulk import of GnuCash XML file

Reduce import time to about 1/3 .
FIX: acount title color propagation
Merge branch 'import_zip' into next_minor
Merge branch 'passcode_screen' into next_minor
Tried to speed up endElement

reduce the number of calls of equalsIgnoreCase. reduce the number of
call to printStackTrace. Not much impact is seen on the overall runing
time.
Bulk insert refinement

propagate exception out of bulk insertion.
Delete all empty transaction after insertion.
Speeding up Account balance calculation

Calculate account balance using SQL query.

Conflicts:
	app/src/org/gnucash/android/db/AccountsDbAdapter.java
	app/src/org/gnucash/android/db/SplitsDbAdapter.java
rewrite backup procedure, use XmlSerializer
Backup use zipped Gnc XML
Import of exported status

Exported status default to 'true'
bug fix import of exported status