add md-body-1 class to typography output
add md-body-1 class to typography output

mize85/ember-material-design,sumn2u/ember-material-design,jhr007/ember-material-design,mize85/ember-material-design,mike1o1/ember-material-design,jhr007/ember-material-design,sumn2u/ember-material-design,mike1o1/ember-material-design