APS-27 bugfix: Fix DESC variable

- Incorrect ROLLNAME in DESC variable (copy/paste error)
  replaced with 'skeleton' so that rename_roll.sh will
  replace it with the new ROLLNAME.
APS-27 bugfix: 'skeleton' missing in README.md

- Replaced '<ROLLNAME>' with 'skeleton' in README.md so that rename_roll.sh
  will replace it with the new ROLLNAME.
APS-27 bugfix: Various version.sh updates

- Properly detect ROCKSVERSION and use to find appropriate
  annotated tag.
- Better detection of 'tagged downloads' (ie. NOT git repository)
- Better handling of missing annotated tag(s).
- Addition of '-a' option
Formatting/content changes
We don't support building on SunOS
Remove userguide from skeleton
Added default .gitignore