scripts - Move config into separate subdir to clean things up

Make a cfg directory that has all config in it, move all the config
there, and rename all files that are supposed to be dotfiles to
dotfiles..  Fix up the install script to work properly, and add a new
scripts-fixup command to fix this kind of thing.
scripts-setup - More structured installation

- Create arrays of dir/file combos to install, and some functions to
  check them for validity and install them via either symlink or copy.
- Move bashrc.d/local to cfg/.bashrc.d to be consistant
- Add .ssh/config
Add flavor for centos
Update README