Make the Neon installation instructions clearer.
Make the Neon installation instructions clearer.

Patch by: Madan U S <madan@collab.net>
(Tweaked by me.)

* INSTALL: Modify the Neon installation instructions to make a
  clear distinction between using Neon inline and using it outside
  the Subversion build.  Reorganize for clarity.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion