remove preprocess page to modify main_menu and secondary_menu
add nolink and separator class
#1698690 Tag attributes are present in closing tag (without regex)
#1698690 tag attributes are present in closing tag
#1447988 Override theme_link instead of the theme_menu_link
#1677982 fix bad closing tag by marci003 and elBradford
remove some trailing space
#1616108 Avoid registry collision
#1652088 syntax error
#1221294 option to use href='#' for nolink items to not break other modules
