Updated references to Refinery CMS repository
Updated references to Refinery CMS repository

Also changed ruby highlighting to erb highlighting.
anitagraham/refinerycms-testimonials,anitagraham/refinerycms-testimonials,chrise86/refinerycms-testimonials,chrise86/refinerycms-testimonials,anitagraham/refinerycms-testimonials,chrise86/refinerycms-testimonials