Vancouver-2013: Extend call for proposals date to 23rd Sept
Merge pull request #482 from philwhln/master

Vancouver-2013: Extend call for proposals date to 23rd Sept
added Robin Osbourne's talk to the site
Merge pull request #485 from stack72/master

Robin Osbourne - London 2013
Portland 2013: Add Sean Porter proposal
Merge pull request #486 from webframp/dod-pdx-porter

Portland 2013: Add Sean Porter proposal
Vancouver-2013: More talks!
Vancouver-2013: tweaked talk name, as it was breaking link
Merge pull request #487 from philwhln/master

Vancouver-2013: Added 4 more talks
fixed Eric Shamow link (questionmark in path)