Closes#1379
We should check owner witness before adding more tokens to circulation.
Also we shouldn't allow to add to circulation more than TokenSupply
tokens.
neo-storm has developed more wrappers for syscall APIs, so they can and should
be used as a drop-in replacement for pkg/vm/api. Moving it out of vm, as it's
not exactly related to the VM itself.
* Initial draft of the ICO template ported from NEX.
* filled in token configuration
* added kyc storage prefix
* fixed byte array conversion + added tests
* fixed broken test + made 1 file for the token sale example.
* implemented the NEP5 handlers
* bumped version