Add setters/getters to cib custom objects/view/windows.

Reviewed by me.

AppKit/Cib/_CPCibCustomObject.j

@@ -14,6 +14,11 @@ var _CPCibCustomObjectClassName = @"_CPCibCustomObjectClassName";
     return _className;
 }
 
+- (void)setCustomClassName:(CPString)aClassName
+{
+    _className = aClassName;
+}
+
 - (CPString)description
 {
     return [super description] + " (" + [self customClassName] + ')';

AppKit/Cib/_CPCibCustomView.j

@@ -35,6 +35,11 @@
     return _className;
 }
 
+- (void)setCustomClassName:(CPString)aClassName
+{
+    _className = aClassName;
+}
+
 @end
 
 var _CPCibCustomViewClassNameKey    = @"_CPCibCustomViewClassNameKey";
@@ -58,6 +63,11 @@ var _CPCibCustomViewClassNameKey    = @"_CPCibCustomViewClassNameKey";
     [aCoder encodeObject:_className forKey:_CPCibCustomViewClassNameKey];
 }
 
+- (CPString)customClassName
+{
+    return _className;
+}
+
 - (id)_cibInstantiate
 {
     var theClass = CPClassFromString(_className);

AppKit/Cib/_CPCibWindowTemplate.j

@@ -97,6 +97,17 @@ var _CPCibWindowTemplateMinSizeKey              = @"_CPCibWindowTemplateMinSizeK
     [aCoder encodeObject:_windowIsFullBridge forKey:_CPCibWindowTemplateWindowIsFullBridgeKey];
 }
 
+- (CPString)customClassName
+{
+    return _windowClass;
+}
+
+
+- (void)setCustomClassName:(CPString)aClassName
+{
+    _windowClass = aClassName;
+}
+
 - (CPString)windowClass
 {
     return _windowClass;