fixes #4
add a user group section
use the shortcut notation of the embedded tags in gstring
Adding Groovy Users of Minnesota
Adding the #groovylang hashtag twitter search in the socialize menu
Added Belgium Groovy/Grails User Group
Merge pull request #12 from staticnull/patch-2

Adding Groovy Users of Minnesota
Update usergroups.groovy

Added Bangalore Groovy Grails meetup
add Austin Groovy and Grails user group
Update usergroups.groovy

Danish section
Update of users group page

Added the Grails Brasil community
Added Columbus User Group Grails and Ales
Added Israel and NY
posh-gvm and bintray
Add Madrid-GUG

Add Madrid Groovy User Group
Added GR8Conf EU 2015 and temporary image
Merge pull request #13 from YouriAckx/patch-1

Added Belgium Groovy/Grails User Group
Merge pull request #15 from rvanderwerf/patch-1

add Austin Groovy and Grails user group
Merge pull request #16 from sbglasius/patch-1

Update usergroups.groovy
Merge pull request #17 from loboweissmann/patch-1

Update of users group page
Fixed location