

added lazy find for module switch

Example:
Say you have the following modules   perl/5.6 perl/5.8(default)
and you have perl/5.6 loaded currently.
Now you can do module switch perl perl
and it will unload perl/5.6 and load perl/5.8
before it would error saying the perl module is not loaded.

Kent

abrodkin/modules,abrodkin/modules,wtsi-hgi/modules,wtsi-hgi/modules,wtsi-hgi/modules,abrodkin/modules,abrodkin/modules,wtsi-hgi/modules