Updates and fixes

Name spaced general modal to .modal_overlay
Updates and enhancements

Updated published date, modal namespace, menu styles
Added support for slide show srcset attribute and picture fill
Modified prepend and append icons to form elements css
Modified core tooltip styles
Publish date and modal changes
Deleted duplicate libraries
Added Assets for secretes slide show
Move assets to libs folder
Added to project libs folder
Added picturefill js to core

Added picture fill srcset js polyfill to main plugins file and adadded
assets to libs
Updated Theme files
Removed unused scripts
removed old source
Updated plugins to most recent versions