This moves call and create to the specified environments. Vms are no
longer re-used. Vm uses environment's Call(Code) and Create in order to
execute new contracts or transfer value between accounts.

State transition now uses the same mechanism described above.

Fix for broken develop build and install.sh

Transaction execution fixes - 60cdb114

In some cases the iterator didn't properly return the correct key
because it didn't append fields to the reverse lookup.

* Reimplemented caching for trie
* Reimplemented resetting and persisting trie