Got leveldb into project & makefile, started test
Progress learning about leveldb...
Not only does it the test scan work, damned fast!
Not exactly right, but full scan in 8.9s !?!
Working balance/UTXO list (double scan) in 13s!
Added the PayloadHeaders class for PyMessage
Started filling in the levelDB wrapper
Merge branch 'leveldb' into ramreduceleveldb (mostly)

Conflicts:
	armoryengine.py
	cppForSwig/BlockUtilsTest.cpp
	cppForSwig/Makefile
Started a new proxy class for LevelDB/multimap ops

I'me hoping that the proxy class will be allow me to define identical
operations for both the multimap<> (RAM) solution and the LevelDB (HDD)
solution.  A simple preprocessor would let you switch between them at
compile time.

It's definitely more complicated than just updating the code directly to
use LevelDB... But it may be worth it in the long run.
Lot of supporting methods implemented for LevelDB transition

Haven't actually updated parseEntireBlockchain, readBlkFileUpdate, or
any of the get____() functions yet.  Plenty left to do (and test!).
Butchering the code even more...
Destroyed everything, piecing it back together....
Closing in on a prototype of persistent data...
A lot more to update than I thought...
This is becoming too involved for a partial upgrade

I think the solution is to not do a partial RAM-reduction update.  I
will just do the full Armory-maintains-its-own-blockchain, all at once.
However, that is lower on my priority list, so I'm going to go back to
the new wallet for now, and come back to this later.
Improvements to paper-wallet restore error handling

Various improvements to error handling when restoring wallets from paper
backups. Handle out-of-charset characters (treated as zeroes), odd-length
inputs (treated as uncorrectable errors), missing checksums (treated as
corrected errors, instead of being silently ignored).

Also print line numbers when reporting errors during restore.
Updated frag scripts to use x=1...N, instead of random x
Adding backup-center dialog
Backup center is looking good!  Getting close...

Just need a little more polish and better descriptions.  Then I start
the fragmented-backup dialog
Backup center works well, except for fragmented backups