Component foundation

• [+] Introduced function to list defwebcomponent ignored keys
• [+] Introduced functions to check for Web Components technologies support
• [+] Enhanced host syntax to support attributes
• [+] Extended document and style syntax to support media queries
• [+] Much improved support for properties
• [~] Renamed content to document
• [~] Renamed base-type to host
• [~] Renamed attributes to properties
• [~] Renamed hooks (*-fn to on-*)
• [~] Moved examples to Web Component with real live view support
• [-] Removed support for handler
• [-] Removed support for constructor
• [-] Removed support for document and style defined as function
• And a bunch of bugs fixed.