Add new API call, debug_verify_delegate_votes

The new API call will tally up the votes for a delegate according to the
existing balance records, then compare those with the votes stored for
the delegates in the database. If any discrepancies are found, these are
returned.
Merge branch 'develop' of github.com:BitShares/bitshares_toolkit into develop
fix bugs and improved short price precision
Merge branch 'develop' of github.com:BitShares/bitshares_toolkit into develop
fix abs 32 bit use where 64 bit should have been used
bump genesis
Resolve #612: Parents can now update children's published slates
Merge branch 'develop' of github.com:BitShares/bitshares_toolkit into develop
added ability to support old and new market engine
Merge branch 'develop' of github.com:BitShares/bitshares_toolkit into develop
adding backward compat
merge from develop
add market fork block number checking code, after this do not using the new market engine