Discussion: Add Travis-CI to run a few tests on new code pushes

[metachris]

I propose adding a continuous integration system to neo-cli to test the basic functionality on every code push. This includes:

• Building and running neo-cli
• Creating wallets and addresses
• Running json-rpc requests
• Querying nep-5 token balances

The reason is that exchanges are integrating NEO and NEP-5 tokens and rely on the latest neo-cli releases. Issues like #71 can have a major impact, where the latest release doesn't allow nep-5 related json-rpc requests.

I would start with a simple .travis.yml file like this: https://github.com/metachris/neo-cli/blob/travis-ci/.travis.yml.

Depending on whether you want to have the Dockerfiles and test scripts also in this repository, I'd start with test scripts that verify the above functionality.