Featured Enabled Resource Manager and reorganised Show case forums

Forums have enabeld the Resource Manager https://community.centminmod.com/resources/ which I plan to use to popular with Centmin Mod Nginx related web app configuration guides including Wordpress, vBulletin, IP.Board, Xenforo and ownCloud etc. It has it's own accompanying Resource discussion forum at https://community.centminmod.com/forums/resource-discussions.16/.

Also have moved the Showcases and Testimonial forums https://community.centminmod.com/forums/show-cases-centmin-testimonials.6/ from under Introductions forum to under the Community category. This forum is for Centmin Mod users to promote and show case sites or web apps they use Centmin Mod with etc.

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