event-waiting code in client and other miscellaneous fixes.

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

use go-wire data mapper for consistent JSON, use transactor, get rid of unused
file fixtures and use uint64 height.

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

splitting up event payloads, add EventCache to drop dependency on Tendermint's
EventCache.

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

packages, and dubious tests, relocate nearer to code being tested.
Rewording of some docs, use gopkg for deps in makefile.

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