Did a few things here, designed to make the scripts more portable:

- Broke out some of the more commonly used variables into a separate
  file, called 'var_file.sh'. I'm including an example in the repository,
  but anyone wanting to use these scripts will need to copy
  'var_file.example.sh' to 'var_file.sh' and adjust all the variables
  to suit their needs.
- I changed all (I think) variables in the scripts to use ${VAR} style,
  which, I understand, is better practices than what I had going on. It
  was a huge mess!
- I substituted 'single-quotes' in the place of "double-quotes" where
  possible in the echo statements, because (for the most part) all the
  echo statements are literal, and don't need the possibility of being
  interpolated by bash.

Signed-off-by: Elliot Voris <elliotfriend@gmail.com>