change source of select, fixes #61

src/inputs/abstract.js

@@ -151,11 +151,16 @@ To create your own input you can inherit from this class.
                this.$input.addClass(this.options.inputclass); 
            } 
        },
+       
        setAttr: function(attr) {
            if (this.options[attr]) {
                this.$input.attr(attr, this.options[attr]);
            } 
-       }       
+       },
+       
+       option: function(key, value) {
+            this.options[key] = value;
+       }
        
     };
         

src/inputs/list.js

@@ -234,7 +234,17 @@ List - abstract class for inputs that have source option loaded from js array or
                 });  
             }
             return result;
-        }
+        },
+        
+        option: function(key, value) {
+            this.options[key] = value;
+            if(key === 'source') {
+                this.sourceData = null;
+            }
+            if(key === 'prepend') {
+                this.prependData = null;
+            }            
+        }        
 
     });