pull request review

+ add changelog entry
+ put widget example migrations in the widget migrate folder
+ bugfix: google maps html class was changed, so the less file had to be adopted
+ bugfix: ARGV does not work for our integration tasks, as it holds the arguments first passed to the command, but not the arguments that may be past in in subsequent calls of sub generators
+ added some more example content and rearranged the order in which those examples are created to have more control on what is generated
+ bugfix: login and form builder specs were broken
+ adopted widget specs to include examples