added class Xhtml5Template
split the initialization of @base into a function
attributes of an element can be passed as a parameter of HtmlElement#intialize()
attributes of an element can be passed as a parameter of HtmlElement#intialize()
a refactoring of HtmlTemplate#set_path_to_base()
defined HtmlTemplate#create_element
create elements using create_element
make HtmlTemplate#set_path_to_base() private
passed an attribute of @html as a parameter
Content-Language is obsolete in Html5
made the declaration of charset html5 conformant
removed <meta http-equiv="Content-Script-Type" content="text/javascript" />
Add Xhtml5Template