feature: Allow use of snap-opt-* attrs for opts
feature: Allow use of snap-opt-* attrs for opts

Malkiat-Singh/angular-snap.js,kzganesan/angular-snap.js,Malkiat-Singh/angular-snap.js,jtrussell/angular-snap.js,kzganesan/angular-snap.js,jtrussell/angular-snap.js