Multiple updates for restaurant distro.

- Comment fixes.
- Minor code fixes.
- Updated revision for restaurant_base: ce23e5a Merge branch '7.x-1.x'
of github.com:drupalrestaurant/restaurant_base into 7.x-1.x.
- Make quick installation recommended.
- Rename go to site to view site.
- Push again to github to set upstream.
- Add an import message when importing table.
- Import files from demo modules when using quick install.
- Make sure clean url is enabled after installation.
- Added 7.x-1.0-beta3 to travis.