Fixed Aptana RadRails GEM_LIB issue on m…

Fixed Aptana RadRails GEM_LIB issue on mac by linking ‘/Users/{user}/.gem/ruby/1.8/gems’ to ‘/usr/local/lib/ruby/gems/1.8/gems’. I can’t blame Aptana for this since it was me who chose to use a tool built by a company that spread itself too thin. I doubt they have more than a couple of engineers working on RadRails which is not enough to provide the necessary quality across the range of environments Aptana is unfortuantely being asked to support.