moved counter html to counter.js
added validation to counter directive
added test for counter directive Refs item: 303
Merge branch 'upstream-develop' into refactor/redesign-counter-ui
renamed isValid function to isInvalid Refs item: 303
Merge pull request #145 from jofomah/refactor/redesign-counter-ui

Refactor/redesign counter ui
Merge branch 'develop' into stock-count/toggle-help-content