Update README.md
Update README.md
Update README.md
Update README.md
Added GDG Dusseldorf DevFest 2014 URL.
Merge pull request #32 from GDG-Dusseldorf/upstream

Added GDG Dusseldorf DevFest 2014 URL.
Update README.md
updated readme with gdg makerere devfest site link
Merge pull request #36 from atimothee/master

updated readme with gdg makerere devfest site link
updated readme with gdg busitema devfest site
Merge pull request #37 from atimothee/master

updated readme with gdg busitema devfest site
Added DevFest Vienna 2014