SequentialSigningAccount and implement hash-free signer (not in use yet)

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

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

signing under a single interface method.

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

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

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

Move state to sub-package fixing cyclic dependency.
No longer expect insufficient gas for nested call.

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>

for return types shared by the RPC - leaving v0 only one as they were
(for now). This is for integration in Bosmarmot.

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

to avoid crashing entire network due to transactions that triggers a
panic.

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

empty address - restoring correct behaviour for JS libs.

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

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

Makes our events non-blocking and adds Query logic.

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>

encapsulate go-crypto within our account abstraction layer, remove
various panics, prefer stdlib ed25519 methods over go-crypto.

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

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

wrap encoding/decodding in an interface to allow for alternative codecs.

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