assetID for account on smart contract now optional

Signed-off-by: FellowTraveler <F3llowTraveler@gmail.com>
Fix: smart contracts where asset ID not specified.

Signed-off-by: FellowTraveler <F3llowTraveler@gmail.com>
Merge pull request #23 from FellowTraveler/master

made assetID optional on smart contracts (in template form)