Update install script

- Update README to include requirements, instructions for installation
  with flag options, ability to update all packages (brew, gems, npm,
  php, pip) installed with information (links and descriptions), OS X
  defaults and their descriptions, instructions on how to add and update
  git submodules, information on the custom bash prompt, local/private
  bash configuration, and how to deal with ViM plugins and their
  installation, overview for features, add back in default screenshot
  from @necolas
- Update `osxdefaults` with updated configurations desired
- Delete undesired defaults from unused programs
- Update `bash_profile` with additional `.bash_profile.local`
- Update help for install with new flags added
- Update brew installation with new packages (ffmpeg, graphicsmagick)
- Update brew installation with homebrew-dupes file
- Create homebrew cask dupes file for installing rsync
- Update cask fonts with Open Sans as @rolandwalker fixed issue
- Update gem installation file to be lexicographical
- Update npm installation file with gify as per @necolas
- Update man page for installation with new flags; rename to
  `bash_install` so as not to conflict with anything else
- Update installation file to have help/list flags up front for user who
  downloads package first, then installs and doesn't want verbose
  messaging; rename to bash_install so as not to conflict with anything
  else
- Delete solarized vim colorscheme from ViM bundles

Issue: #9