directive to add class for bootstrap when things are invalid
directive to add class for bootstrap when things are invalid

I think this will be useful

I-TECH-UW/mwachx,tperrier/mwachx,tperrier/mwachx,I-TECH-UW/mwachx,I-TECH-UW/mwachx,I-TECH-UW/mwachx,tperrier/mwachx,tperrier/mwachx