Fixed deadlock in BlockChain::run()
Merge remote-tracking branch 'subtly/develop' into develop-subtly
Changed Client::setAddress() to set m_postmine as well, since now m_postmine gets updated only when Client::sync() is called and it's not guaranteed to be called before mining starts (e.g. when mining the very first block, with no pending transactions)
Merge remote-tracking branch 'subtly/develop' into develop-subtly

Conflicts:
	libethereum/BlockChain.cpp
Merge branch 'develop-subtly' into poc6net
Merge pull request #287 from giact/poc6net

Deadlock when sending a new transaction; missing coinbase when mining the first block