Update product page to use vnProductImageFilter:
* add getImagePath fn to controller
* Update view code to parse for image
Merge pull request #77 from volusion-angular-themes/fix-product-imgages

Update product page to use vnProductImageFilter:
vnProductImageFilter Hotfix:
* handle return of empty strings from vnProductImageFilter
* Remove track by  from search & category repeaters (they were reusing html)
* track by should use product.id or something perhaps
* Paired / Codereview with @Tsanko