Page Header: Generate HTTP response and HTML page headers

This class can generate HTTP response and HTML page headers.

It can generate HTTP response headers for several purposes like avoiding page caching, force downloading files, or add any arbitrary headers.

The class can also generate HTML for the page head section for several purposes like including CSS or JavaScript files, defining the document type, add meta tags to define page keywords, description, rating, content type, character set, page title, shortcut icon, etc..