Redirect Summit page to the canonical event site - #83

Changed pages include:

• index.html - view
• about/index.html - view
• articles/index.html - view
• authors/index.html - view
• calendar/index.html - view
• code-of-conduct/index.html - view
• community-awards/index.html - view
• community/index.html - view
• contact/index.html - view
• contributing/index.html - view

There are more changes not included in the list