Implement a method for creating a highlight annotation via a PDFSelection object.  Currently somewhat limited in functionality, but does highlight individual lines.  The drawing method is not currently compatible, but I  was able to test this using super's drawing implementation (works for me).
Implement a method for creating a highlight annotation via a PDFSelection
object.  Currently somewhat limited in functionality, but does highlight
individual lines.  The drawing method is not currently compatible, but I 
was able to test this using super's drawing implementation (works for me).


JackieXie168/skim,JackieXie168/skim,JackieXie168/skim,JackieXie168/skim,JackieXie168/skim