* Virtual machine for the NEO blockhain.
* fixed big.Int numeric operation pointer issue.
* added appcall
* Added README for vm package.
* removed main.go
* started VM cli (prompt) integration
* added support for printing the stack.
* moved cli to vm package
* fixed vet errors
* updated readme
* added more test for VM and fixed some edge cases.
* bumped version -> 0.37.0
* Initial draft of the neo-go wallet
* Cleanup + more test for util package
* integrated wallet into neo-cli partially
* base wallet implementation + smartcontract code.
* Print proper error messages while using contract subcommands and also exit with status code 1.
* Make -in a flag, also remove dot from avm extension.
* Work on feedback by Anthony.
* Update README and VERSION
