Update install with flag to turn on/off

- After much searching the interwebs, I found an article[1][redirect]
  that pointed me to a solution for redirecting the both stdout and
  stderr to the null device, based on a variable that is set
- Updated all print functions to use this new logging function
- Was having trouble getting the flag set from the dotfiles script to
  pass through to the ./lib/utils print functions, so after hitting up
  StackOverflow, my question was answered[2][flags]

[redirect]: http://stackoverflow.com/a/2520269/1536779
[flag]: http://unix.stackexchange.com/a/122466/58263

Issue: #11