updated content for more support options section
new content for jumbotron
updated content in mailing lists section
content updates

New description for protege-user mailing list and fixed link to list
archive.
content updates

Corrected content and links in the Subscribe dialog for the new
protege-user mailing list.
content updates

Added description of new protege-dev mailing list and updated link to
list archive.
content updates

Corrected content and links in Subscribe dialog for new protege-dev
mailing list.
content updates

Corrected all information on the Support page about the protege-announce
mailing list, as well as info and links in the Subscribe dialog.
content updates

Fleshed out the contents of the Developers tab in the documentation
section of the page.
content updates

Fleshed out the Users tab in the documentation section of the page.