Removed the managed tx state from the chain manager to the transaction
pool where it's much easier to keep track of nonces (and manage them).
The transaction pool now also uses the queue and pending txs differently
where queued txs are now moved over to the pending queue (i.e. txs ready
for processing and propagation).

The transaction pool drops processed transactions on its own
during pool maintenance.

* JUMPDEST analysis is faster because less type conversions are performed.
* The map of JUMPDEST locations is now created lazily at the first JUMP.
* The result of the analysis is kept around for recursive invocations
  through CALL/CALLCODE.

Fixes #1147

This reduces the amount of queueEvents that are sent internally.

In this incancation, the processor waits until the nonce
has been verified before handling the block.

Invalid forks are now detected

Current setup of parellelisation actually inserts bad blocks. This fix
is tmp until a better one is found

* Miner should no longer generate blocks with a time stamp less or equal
than it's parent.
* Future blocks are no longer processed and queued directly.
  Closes #1118

This reverts commit be2b0501.

Hash 38f5bbbffd74804820ffa4bab0cd540e9de229725afb98c1a7e57936f4a714bc
ignored.