use backgrid instead of slickgrid

Backgrid was way easiier to integrate with the graviton backend. If we have problems with client
side paging we can always revisit this. As it stands we are paging on the server anyhow for the
time being.
fix menu for real data
hardcode base url into all requests

this obviously still needs improving
ignore dist/ directory
simple cloudfoundry build manifest
Merge branch 'feature/integrate-with-graviton' into develop