Update site/content/events/2013-amsterdam/_sponsors.txt

EngineYard, now the logo
correct name Mies

just to be complete (and to test my new repo on my mac)
welcome google & serverdensity for London
New proposal for the talks

Pavlo Baron submitted his talk
added opscode talk for Austin
Merge branch 'master' of github.com:jedi4ever/devopsdays-webby
Merge pull request #113 from dpando/master

Several updates for NZ event
Merge branch 'master' of https://github.com/drozer/devopsdays-webby into drozer-master

Conflicts:
	site/content/events/2013-amsterdam/_sponsors.txt
Merge branch 'master' of github.com:jedi4ever/devopsdays-webby
Remove language flags while we didn't decided what to do
Merge pull request #114 from aheritier/2013-paris/remove-flags

Remove language flags while we didn't decided what to do
Paris 2013 : Release management at the speed of agile
Merge pull request #115 from aheritier/2013-paris/proposals/ReleaseManagement

Paris 2013 : Release management at the speed of agile
Paris 2013 : (Devs && Ops).toPublicCloud()
Merge pull request #116 from aheritier/2013-paris/proposals/PublicCloud

Paris 2013 : (Devs && Ops).toPublicCloud()
added serena sponsor for Paris
Serena is Gold for Paris
updated Zeroturnaround logo
proposals date for paris moved
updated Heavy Water software logo