Updated to latest sha3 implementation. Fixes #48
Added new list type which can embed any slice type
Changed back to FIPS 180
Reset the transient state when a new block's been found
Contract creation address are empty again
New OPCODES

* EXT- CODECOPY, CODESIZE
Make use of new list type for transactions instead of json
Added GetCode method
Added CALLSTATELESS
add pushtx to api

Previously the software assumed use of an internal private key for use in all broadcasted transactions. This addition lets nodes relay pre-signed transactions originating from sources other than the node itself.
Merge branch 'feature-pushtx' into develop