update program.md files for responsive design

[mattstratton]

The existing program.md in the current sites, as well as the example site, need to be refactored to match the layout as specified in the /content/events/2016-chicago/program.md file in mattstratton/redesign branch.

[mattstratton]

Amsterdam was addressed by 6a2b489

[bridgetkromhout]

Make sure these are done:

- [ ] Istanbul - one-day, doesn't need to change

- [ ] Washington, DC - uses busyconf

• Salt Lake City - 48b3874
• Silicon Valley - 87e9db5
• Amsterdam
• Porto Alegre - 9f604f6
• Minneapolis - 63ef2ce
• Portland - 48b3874

- [ ] Baltimore - uses busyconf

- [ ] Boston - placeholder - just ensure they use the correct sample when they are ready.

• Chicago
• Oslo - 48b3874
• Dallas - af9c565
• New York - 48b3874
• Raleigh - 48b3874
• Boise - 48b3874
• Singapore - 63ef2ce
• Detroit - 48b3874
• Kansas City - 48b3874
• Philadelphia - 48b3874
• Ghent - 48b3874

- [ ] Bangalore - doesn't use our site

- [ ] Nashville - no program yet

• Ohio - 48b3874
• Cape Town - 48b3874
• Madison - 48b3874
• New Zealand - 48b3874

[bridgetkromhout]

Also: updated sample program: 2eb89fe

[bridgetkromhout]

Done.