Besides following the directions given by CD and reading the first link which suggests you install the libraries in a specific path, there is another place you can put them: inside of your default sketch library.
My default sketch library path is inside of my DropBox folder so that I can access them both from my desktop at home, at work, or my laptop. Inside of that path, where the IDE creates individual folders for each sketch, you can create another folder titled 'libraries' and drop your libraries in there.
This has the advantage of not needing to copy them over to a new version of the IDE every time you upgrade.