renamed cmdArgs to opts
Merge branch 'master' of github.com:paulpflug/grunt-express-server into paulpflug-master

* 'master' of github.com:paulpflug/grunt-express-server:
  renamed cmdArgs to opts

Conflicts:
	README.md
	tasks/express.js
	tasks/lib/server.js
Bump to v0.4.15