more forgiving code highlight line number format, add Promise polyfill

Author: hakimel

lib/js/promise.js

@@ -84,8 +84,7 @@ var RevealMath = window.RevealMath || (function(){
 
 			} );
 
-			// lofi xbrowser Promise.resolve()
-			return { then: function( resolve ) { resolve(); }};
+			return Promise.resolve();
 
 		}
 	}

plugin/highlight/highlight.js

@@ -168,8 +168,7 @@ var RevealNotes = (function() {
 
 			}
 
-			// lofi xbrowser Promise.resolve()
-			return { then: function( resolve ) { resolve(); }};
+			return Promise.resolve();
 
 		},
 

plugin/math/math.js

@@ -22,8 +22,7 @@ var RevealZoom = (function(){
 				}
 			} );
 
-			// lofi xbrowser Promise.resolve()
-			return { then: function( resolve ) { resolve(); }};
+			return Promise.resolve();
 
 		}
 	}