*: Change highlighters' namespace.

Fixes #329.

Merge remote-tracking branch 'danielsh/i329-v1'

* danielsh/i329-v1:
  highlighters: Rename entry points.
  driver: Rename highlighter entry points

highlighters/cursor/cursor-highlighter.zsh

@@ -32,14 +32,14 @@
 : ${ZSH_HIGHLIGHT_STYLES[cursor]:=standout}
 
 # Whether the cursor highlighter should be called or not.
-_zsh_highlight_cursor_highlighter_predicate()
+_zsh_highlight_highlighter_cursor_predicate()
 {
   # remove cursor highlighting when the line is finished
   [[ $WIDGET == zle-line-finish ]] || _zsh_highlight_cursor_moved
 }
 
 # Cursor highlighting function.
-_zsh_highlight_cursor_highlighter()
+_zsh_highlight_highlighter_cursor_paint()
 {
   [[ $WIDGET == zle-line-finish ]] && return