Rework script so it only installs if rbenv and plugins don’t exist since the rbenv-update plugin takes care of updating rbenv and any installed plugins (awesome!!). Also with rbenv-gem-rehash no need to ever have to run rehash anymore as it does automatically whenever installing a gem.
The laptop script is now safe to run at anytime, either when first setting up or afterwards to update some tools. Not all tools are updated on purpose. For example, major ones like any Homebrew installed ones are needed to be updated manually as a precaution. Other tools are safe to upload whenever. Some are just reinstalled every time the script runs as its not critical and just easier to support/write (e.g. cloud66, coda)
The pkgconfig tool resolves an imagemagick issue by helping your system find important header files http://thomasvendetta.com/article/2013/12/configuring-imagemagick-rmagic k-and-homebrew-play-nicely-together-os-x-mavericks