account

With TITAN, it is possible to send anonymously or from a different
account than is paying, as long as the sender holds the private key of
the sending account. This commit adds experimental support for this,
though it has not yet been tested.
Merge branch 'develop' of github.com:BitShares/bitshares_toolkit into develop

Conflicts:
	libraries/client/client.cpp
Merge branch 'develop' of github.com:BitShares/bitshares_toolkit into develop
Fix genesis json
Merge branch 'develop' of github.com:BitShares/bitshares_toolkit into develop