1) Download this repository to local machine
   - git clone git@github.com:stakahama/rlib.git
   - to update, use ./pull
2) To commit edits, use ./push "message".

There is a function in my .Rprofile called populate.env(). I use this function to load the scripts (which I keep in "~/lib/R") in a separate namespace and attached to R's search() path. Example usage:
    populate.env("mylib","~/lib/R")
or, for single files,
    populate.env("pies","~/lib/R/more-axes.r")