More appropriate run loop.

README

@@ -10,8 +10,10 @@ In order to build slock you need the Xlib header files.
 
 Notes
 ------------
-As of right now, this implementation assumes that the user has no automatic
+* As of right now, this implementation assumes that the user has no automatic
 display management utilities, like mutter.
+* Also, I have not tested this program with multiple displays. The assumption
+is that you have one display, for now.
 
 
 Installation