floatedClass shifted to wrapper and DOM events added

The class that gets added to the DOM (as default `ffl-floated') was shifted from the label element to its wrapping parent element so you get more flexibility for styling. And we have added the first two DOM events that make it easier to handle with the plugin.

Changed sass maps to regular variables

We switched back from using sass maps as settings to regular variables so you don´t have to overwrite whole maps when you only want to change one setting.