Merge pull request #294 from pjf/bugfix_i_broke_netkan

I brokez the NetKAN. This fixes it.
Fixed a bug where ships could no longer be installed.

Introduced in #287. Oops.

Have tested with our mods that install to GameRoot, and they seem to be
fine.

Have not tested with tutorials. I think they're fine, but we may see
another PR after this.
Merge branch 'fix_ships_installs' into netcache

* fix_ships_installs:
  Fixed a bug where ships could no longer be installed.
Fix bug where cached files would be stored with wrong names.

This was harmless to CKAN operation, but sure made things confusing
for humans.