Add build instructions

[mikeshultz]

Would be helpful to have build instructions for those that might want to contribute to the project.

[mikeshultz]

Taking a whack at it.

Install dependencies

npm install

Run

var TestRPC = require("./index");
var server = TestRPC.server();
server.listen(port, function(err, blockchain) {console.error(err,blockchain);});

However, getting this now with nodejs version 6.11.1:

$ nodejs index.js 
module.js:597
  return process.dlopen(module, path._makeLong(filename));
                 ^

Error: Module version mismatch. Expected 48, got 57.
    at Error (native)
    at Object.Module._extensions..node (module.js:597:18)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (/home/mike/dev/ganache-core/node_modules/scrypt/index.js:3:20)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)

Working on it...

EDIT:
Versions are NODE_MODULE ABI versions and 57 is nodejs v8+.

Running nodejs index.js does nothing, however. Continuing...

EDIT: I was not able to figure out how to run the testrpc server from a command, however, opening a nodejs console in the root of the project dir and running the above statements seemed to work.

[benjamincburns]

Thanks for submitting this, @mikeshultz! Our README.md was updated to include build instructions quite some time ago. Let us know if they're not adequate for your needs!