Split databases into two separate files

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The sdcard has more storage than the phone itself.  The app can take
advantage of this storage by splitting databases into two separate files. 
The first portion, stored on the phone itself, will contain everything up
to and including the salt.  The second portion, stored on the sdcard, will
contain everything else.  Since both parts are needed to decrypt, passwords
remain secure.

This feature also makes it possible to store the second part on the cloud
for easier sharing.  Since the second portion exists on the cloud and
sdcard, the first portion should stay off those media.  Sharing the first
portion should probably be done via USB to maximize security of its transport.

Original issue reported on code.google.com by noel....@gmail.com on 3 Feb 2009 at 10:53

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Original comment by noel....@gmail.com on 3 Feb 2009 at 10:53

• Added labels: Priority-Low
• Removed labels: Priority-Medium

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Original comment by noel....@gmail.com on 3 Feb 2009 at 10:53

• Added labels: Performance