Backporting to beta (openethereum#3718)

* Disaable peer if no common block found

* v1.4.6

js-precompiled 20161126-163347

Merge pull request openethereum#3616 from ethcore/stable-testing

Backporting to stable

js-precompiled 20161118-200650

Merge pull request openethereum#3521 from ethcore/stable-testing

[stable] Check tx signatures before adding to the queue.

js-precompiled 20161116-110138

Removed -Z orbit

Corrected startup executable