LB|SN: fix ruby 2.0.0 installation, added mypackages.bskyb.com as alias for localhost
LAD: implement generic method for downloading Intellij plugins.

Added Slim and Markdown to the list that get installed
LAD: rename instruction
Merge branch 'master' of https://github.com/Ladtech/devup
Merge branch 'master' into intellij_plugins