Signed-off-by: Silas Davis <silas@monax.io>

Improve logging and memomize transactions hashes

Signed-off-by: Silas Davis <silas@monax.io>

Signed-off-by: Silas Davis <silas@monax.io>

Signed-off-by: Silas Davis <silas@monax.io>

Signed-off-by: Silas Davis <silas@monax.io>

event-waiting code in client and other miscellaneous fixes.

Signed-off-by: Silas Davis <silas@monax.io>

Execution: remove manager package/notion to simplify and improve structure
(we only have one manager), remove pipe (busywork and not really a
pipe),
use account, blockchain, and state types and interfaces throughout.
TxCache, BlockCache, and State. Encapsulate Tx execution in Executor
interfaces. Implement Tendermint 0.12 ABCI app. Refactor tests to
support new interfaces and make minor improvements to them.

EVM: Use single definitions of state from account packages and use immutable
Account instead of separate vm accounts. Emit vm debug in standard
logging. Reorganise package. Use strongly typed Address.

Signed-off-by: Silas Davis <silas@monax.io>

licence: remove various GPLv3 copyright headers;

event_new: remove unused package that had been copied for discussion

monax: lingering eris -> monax company rename

licence: last pass, further cleanup

Move Pipe interface to definitions to avoid cyclical imports;
Improve ErisMint startState; genesisDoc assertion, documentation