Updated README.md to link directly to the /dist of the showcase.
Updated README.md to link directly to the /dist of the showcase.

Redirection causes problems, Showcase link is now set to exact url.
rpharrison/bootstrap-for-ember,ritesh83/bootstrap-for-ember,ember-addons/bootstrap-for-ember,ritesh83/bootstrap-for-ember,rpharrison/bootstrap-for-ember,duereg/bootstrap-for-ember