JSON style fix for the creation time in Repo
Mark Repo in error if their root path is missing

When executing a search, add two new constraints:

1. Only consider repostiories that have State == OK.

2. When performing a search, check to the root path. If the path doesn't
exist or there is a permissions issue, set the repository state to ERROR
and update the local repository store.
Merge branch 'feature/newstuff' of http://github.com/andaru/afind into feature/newstuff