Remove all of sidebar.
Remove sidebar from remaining layouts.
Remove CSS rule for sidebar.
Remove twitter include.
Merge pull request #15 from jrha/master

Eliminate sidebar from all layouts
fix a minor typo
Merge pull request #16 from njwilliams/njw/typo

fix a minor typo
Add downloads link to menu bar.
Add downloads page and new generalised layout for simple pages.
Switch menu to new downloads page.
Update general layout to match contacts layout.
Replace category with title for simple standalone pages.
Move downloads to subfolder to match other standalone pages.
Update menu.
Fix page title so links don't break.
Fix whitespace and remove explicit link.
Ensure page title is properly capitalised.
Remove link from page title.
Remove contacts layout and switch contacts to general layout.
Merge pull request #17 from jrha/master

Add downloads link to menu