Woody's simple function addon(updated for 8.1.0)

it is a self used interface which include the following functions, most of the codes were found online, and I just made some minor changes so that it could work for current patch.
Functions:

Hide the left/right end cap,
show class icon in target/player/focus frame
show equiped item level at each slot
show world map coordinator text
turn action bar into red color if out of range
hide the healing text at player frame
successful interrupt announce
Show combat status display

There are some functions which were out of date, so i deleted them from the 1.0.0 version.