Merge branch 'master' into poc-8

Merge branch 'poc-7+'

Merge branch 'develop' into poc-7+

Merge branch 'develop' into poc-6+

Actually stop getting chain once no more to grab.

The last develop commit with poc5-compatible networking.

Networking fixes.

Minor UI improvments.

Merge branch 'master' of github.com:ethereum/cpp-ethereum

Fix for when/unless.

New LLL compiler.

Minor fix.