convert css to less

 - move main.css to less
 - move files in use from ./src to ./less
Merge pull request #424 from strongloop/feature/migrate-css-to-less

convert css to less

#377
add the ui code back for explorer view

- getting an exception : cannot load http://localhost:3000/explorer/resources. No 'Access-Control-Allow-Origin' header is present
- when trying to access the swagger meta data
POC e2e protractor test run
- get test server running for e2e
protractor e2e setup and POC

- protractor setup
- tests for:
- login / logout
- composer navigation
- model create/delete
- datasoruce navigation
back out explorer module code

- was added by accident
updates based on PR feedback
fix merge conflict