change route from /#studio to /#

- remove references to /#/studio in url
Remove references to STUDIO env vars

- change to STRONG_ARC_
- change version in header
Merge pull request #596 from strongloop/feature/change-landing-page-url

change route from /#studio to /#

- remove references to /#/studio in url
- change to STRONG_ARC_
- change version in header

#584