mepo issue with moving fixtures

[mathomp4]

This was discovered by @rtodling. To wit:

1. Clone repo to /path/to/GEOSgcm
2. Move repo to /path/to/GEOSgcm-OLD
3. Clone new repo to /path/to/GEOSgcm

The issue is that mepo init uses absolute paths during its setup. So if you move things like this, even the GEOSgcm-OLD clone will point to the new clone because one exists at that part of the tree.

[rtodling]

Just to add that this "renaming" of directories has been common practice among most, if not all, users of the DAS. I will have to ask that we come up w/ a fix for this before releasing the DAS to anyone beyond the small group of individuals presently testing the Git vs CVS migration.

[mathomp4]

I think #107 has a fix for this. I'm doing some more testing to be sure.