Styling & functionality additions

Corrected the date tags in the post layout so they show up
Removed the <i> tag before <time> tags and used css to achieve the same thing
Added oembed.rb plugin for handling YouTube videos & Instagram pictures (probably not going to use Instagram oEmbeds though, they don't work how I want them to :-( )
Added soundcloud.rb plugin for handling Soundcloud clips
Cleaned up category_gen.rb category_links filter to title case categories for display
Changed category_gen.rb to only use the first word of multi word categories to create the category directory