progress on sharedrop
util to get addr from public key
follow my vote key
Merge branch 'develop' of https://github.com/BitShares/bitshares into develop
Merge branch 'develop' of github.com:BitShares/bitshares into develop
add hashes
Cleanup account op validation logic for easier reading
Merge branch 'develop' of github.com:BitShares/bitshares into develop
Merge branch 'develop' into bitshares

Conflicts:
	libraries/blockchain/account_operations.cpp
Revert "Fix margin call on expired position."

This reverts commit 710fd4132a82f2915c2627202ed8aac8173646d0.