Git and Version string changes

Git and Version string changes

1. Removed dependency on perl Git package.
2. Force code to change directory to $DXSPIDER_ROOT || '/spider'. Also force
   git -C $root describe.
3. Change git commands AGAIN to work on old perls (which mojo won't work on,
   but it makes my life easier).
4. Change version strings to include the perl version in use.