initial commit for the main mixins file
initial commit for the main mixins file

mike-goodwin/JADE-Bootstrap,codepiano/JADE-Bootstrap,mike-goodwin/pug-bootstrap,rajasegar/JADE-Bootstrap,thylux/pug-bootstrap,rajasegar/JADE-Bootstrap,thylux/pug-bootstrap,Andrey-Pavlov/JADE-Bootstrap,codepiano/JADE-Bootstrap,mike-goodwin/pug-bootstrap,mike-goodwin/JADE-Bootstrap