_options, regular_board, _post_action, .css

(1) Store IP addresses hashed - all user check functioning to compare
IPs will compare the hashed version of the current user vs that in the
database.  (2) Board menu moved below main menu as the original
positioning was proving difficult to navigate when the screen was small
enough to force overflow of the regular menu.  Search bar changed to
expand to 100% of the div width when focused.