Switch to V1 protocol

My original plan was to have the V0 implementation, V1 implementation, migration functionality, and unit tests for the same, all done in full *prior* to flipping the V0=>V1 switch.

But this turned out to be a lot of extra work, and kind of a mess. So instead I'm switching over to V1 even before the full migration functionality is done, and then will write the migration functionality after this.

This means that for a brief time in the 13.05 cycle, Dmedia and friends will be using V1 but you wont be able to migration your V0 library to V1.

However, note that all this is done non-destructively... your V0 file layouts and databases wont go anywhere and can be migrated as soon as the migration tool is done.

If this bothers you, it's perhaps a good time to use the stable PPA instead of the daily =)