fatal bug in testnet
fix issuance.validate return
more doc tweaks with lock param for create_issuance

Conflicts:
	docs/API.rst
blockr API tweak
updated API docs
tweak dividend rules; fixes #254
fixed bad merge in docs
update test suite
Merge master in develop
fix merge master in develop
Merge pull request #337 from JahPowerBit/develop

Fix conflicts to merge Develop in master