Update scripts/check_eggs.py and scripts/fetch_eggs.py with logic to find the correct config file. These files should be refactored so they can share some of this code the way I refactored the database management scripts I guess.
Whether running locally or via PBS, $PATH should now be handled in your
user's environment.
This also fixes problems like PYTHONPATH on the new blast nodes being
wrong (because they are x86_64 and the frontends are i686).
Note that you can actually start Galaxy without having an eggs dir now.