Cleanup Documentation and README files (Maintaining HTML Docs in SVN creates "merge noise" for enduser developers.)

I recommend we drop storing html versions of the documents in the SVN. Having these here creates merge noise when they are regenerated across versions. Using the PDF seems sane.

Likewise, I recommend that the following file contents be consolidated into the documentation and removed from Source.

http://scm.dspace.org/svn/repo/dspace/trunk/dspace/docs/postgres-upgrade-notes.txt

Possibly recommend getting rid of some of the "docs" directory structure and instead put one PDF copy of Documentation at top level of project.

Other recommendations for consolidating READMEs and Documentation Welcome....