Avoiding a mixed org install

* init.el: Immediately add elisp-src to load path.
* starter-kit.el: removed corresposnding elisp-src reference

init.el immediately uses org-babel-load-file.  If you have
  your org-mode files in /src (tracking the latest version say) then
  calling org-babel-load-file loads some org files bundled with emacs.  This
  results in a mixed org install.  See
  http://orgmode.org/worg/org-faq.html#mixed-install for details.