Some fixes in SVN, rev 45

Some bug fixes have been submitted to the public SVN repo. They include:

PLCC:
- Folding graphs are drawn like protein graphs now (instead of using unfinished alternate representation which is still under development)
- Output graph formats can now be specified on the command line (new -O or --outputformats option)

VPG:
- The form to generate a DSSP file has the option to automatically delete temporary PDB files after the run
- New Help form (F1) which shows basic info on getting help for VPLG.

These changes are not yet in the release version.