Added initial templates
Added release files for all releases on sourceforge.
Added build tools
Add gitignore to include generated HTML files.
Sort buildInfo dict before outputting it.
Add initial styles for downloads and archives.

- Removed divs in favour of more semantic HTML5 elements.
jQuery to replace button href depending on user's OS. Also:

- Outputs the correct OSX codename based on download URL.
- Removes the related <li> element from the list once it's been used.
Add latest paraview information to downloads page.
Update containers font size to sensible default.
Updated README to include build process.