Fix focus_win function to correctly set window focus.

Fix focus_win function to correctly set window focus.
Time must be specified in ClientMessage WM_TAKE_FOCUS; not
XCB_TIME_CURRENT.

Add timestamp parameter to client_msg.

Track X11 timestamps for use in focus_win.

Track window mapped state.

Check window state before unmapping.

Change focus function to only set workspace focus; need to call
focus_win separately.

Add debug output for FocusOut event.

Replace map_window_raised with map_window function.

Rename get_iconic to get_swm_iconic

Add debug output to client_msg.

Remove unfocus_all since no longer needed.

(Un)iconify in propertynotify.