Fixed some typos and markdown formatting.
Running instructions
Update README.md
added unicorn
Rename app/views/talks/talks.html.haml to app/views/main/talks.html.haml
Rename new.html.rb to new.html.erb
Update Gemfile
Merge branch 'patch-1' of github.com:javierhonduco/gul-gultalks into javierhonduco-patch-1
Removed some deprecated files