relax SVN archive

Modified the behaviour of the Sconstruct clean target to remove 'relax.out' from the LaTeX dir.

Created the downloads section of the web chapter of the manual.

Added a link to the search page to search through the relax bug tracker.

Created the new section of the web chapter of the manual.

Added the repositories section of the web chapter of the manual.

Created the web site, mailing list, and bug report sections of the web chapter of the manual.

Added an outline of the new chapter about the web sites, mailing lists, bug tracker, and
repositories.

The hyperref LaTeX package is now used in the relax manual.

All websites were changed from \texttt{} to \href{}{} to create links.
The links were formatted to all be blue without a box around it.

Removed the spaces in front of the \index{} commands from the manual LaTeX source files.

These spaces were causing formatting problems in the compiled manual. This included spaces between
the last word of a sentence and the full stop.

Added the committers file.