Fixed most of the warnings in a sensible way

NSWindow+Rik.m

@@ -12,13 +12,13 @@
 + (NSButton *) standardWindowButton: (NSWindowButton)button
                        forStyleMask: (NSUInteger) mask
 {
-  NSButton *newButton;
+  RikWindowButton *newButton;
 
   switch (button)
     {
       case NSWindowCloseButton:
         newButton = [[RikWindowButton alloc] init];
-        [(RikWindowButton*)newButton setBaseColor: [NSColor colorWithCalibratedRed: 0.698 green: 0.427 blue: 1.00 alpha: 1]];
+        [newButton setBaseColor: [NSColor colorWithCalibratedRed: 0.698 green: 0.427 blue: 1.00 alpha: 1]];
         [newButton setImage: [NSImage imageNamed: @"common_Close"]];
         [newButton setAlternateImage: [NSImage imageNamed: @"common_CloseH"]];
         [newButton setAction: @selector(performClose:)];
@@ -41,12 +41,12 @@
 
       case NSWindowToolbarButton:
         // FIXME
-        newButton = [[NSButton alloc] init];
+        newButton = [[RikWindowButton alloc] init];
         [newButton setAction: @selector(toggleToolbarShown:)];
         break;
       case NSWindowDocumentIconButton:
       default:
-        newButton = [[NSButton alloc] init];
+        newButton = [[RikWindowButton alloc] init];
         // FIXME
         break;
     }

Rik+Button.h

@@ -0,0 +1,8 @@
+#import "Rik.h"
+
+@interface Rik (RikButton)
+{
+}
+
+- (NSGradient *) _bezelGradientWithColor:(NSColor*) baseColor;
+@end

Rik+Button.m

@@ -1,4 +1,5 @@
 #import "Rik.h"
+#import "Rik+Button.h"
 
 @implementation Rik(RikButton)
 

Rik+Segmented.m

@@ -1,4 +1,5 @@
 #import "Rik.h"
+#import "Rik+Button.h"
 
 @implementation Rik(RikSegmented)
 

Rik+Slider.m

@@ -1,10 +1,12 @@
-#include "Rik.h"
+#import "Rik.h"
 
-@interface Rik(RikSlider)
+@interface GSTheme()
 
+- (void) drawCircularBezel: (NSRect)cellFrame
+                 withColor: (NSColor*)backgroundColor;
 @end
 
-@implementation Rik(RikSlider)
+@implementation Rik (RikSlider)
 - (void) drawSliderBorderAndBackground: (NSBorderType)aType
 				 frame: (NSRect)cellFrame
 				inCell: (NSCell *)cell