Replaced jquery-ui.min.js with uniminified versions.

Concatenated jquery.effects.core.js jquery.effects.slide.js from jquery 1.8.18
to one file and changed the original reference in layout.html to the new
filename.
Merge pull request #1915 from venthur/fix/replace-minified-jquery-files

Replaced jquery-ui.min.js with un-minified versions.