Advanced Content Filter guides proof-read
Corrections in the main README file
Further corrections of the main README file
Brought back slashes in folder names.
Extended ACF guide with object literal-based configuration method.
Added ACF icon to be displayed in guide index.
Extented plugin integration with ACF guide.
Extended first part of integration with ACF guide plus some corrections.
Few more corrections for plugins integration with ACF.
Extended sample plugin guides to inform users about ACF consequences.
Merging from upstream.