Halve max delegate pay per block every 4 years; resolves #935
#918 expose create_address and transfer_asset_to_address
Update web_wallet submodule
Merge branch 'develop' into bitshares
Update submodules
Merge branch 'bitshares' of github.com:BitShares/bitshares into bitshares
Merge branch 'develop' into bitshares

Conflicts:
	programs/qt_wallet
	programs/web_wallet
Update submodules
Fix chain id
Bump chain db version
Merge branch 'develop' into bitshares