Fixes Bug 1108810 - Implement footer for new IA
Fixes Bug 1108814 - Implement "About" page for new IA
Fixes Bug 1108822 - Implement "Tools" page for new IA
Bug 1108811 - Implement header for new IA
Fixes Bug 1108819 - Implement Explore page for new IA
Fixes Bug 1108822 - Implement "Tools" page for new IA
Bug 1108811 - Implement header for new IA
Fixes Bug 1108819 - Implement Explore page for new IA
Polishes mentor page after design review
 Bug 1104272 - Build revised IA
Polishes navigation and footer links
Navigation tweaks
- Use _ pages for redirects to prevent old page collisions (for now?)
- improve navigation styles
removes extraneous nav markup
update teach link in footer to go to /mentor