Merge pull request #1 from effectsToCause/master

core updates and patches
Merge pull request #2 from effectsToCause/master

Protocol patches
Merge pull request #3 from effectsToCause/master

versioning
Merge pull request #4 from effectsToCause/master

add int length for accuracy
Added checkpoint for block 296915
Merge pull request #5 from effectsToCause/master

interest calculated on previous block fix
remove questionable checkpoint
Merge pull request #6 from effectsToCause/master

allow old clients initially
Update checkpoints.cpp
Merge pull request #1 from vericoin/master

catch up