Added Mac OSX XCode project with Cocoa userinterface (wrapping GLUT) for Bullet demos

Thanks to TomorrowPlus for the constribution!

Extras/AllBulletDemosOSX/src/BTSimulationParameters.h

@@ -0,0 +1,44 @@
+/*
+Bullet Continuous Collision Detection and Physics Library
+Copyright (c) 2003-2006 Erwin Coumans  http://continuousphysics.com/Bullet/
+
+This software is provided 'as-is', without any express or implied warranty.
+In no event will the authors be held liable for any damages arising from the use of this software.
+Permission is granted to anyone to use this software for any purpose, 
+including commercial applications, and to alter it and redistribute it freely, 
+subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.
+*/
+
+#import <Cocoa/Cocoa.h>
+
+/*
+	BTSimulationParameters is an instanceable proxy for BTDemo's global
+	simulation properties. We're doing this so we can bind UI to something
+	in the nib file.
+*/
+
+@interface BTSimulationParameters : NSObject {}
+
+- (void) setIterations: (unsigned) iterations;
+- (unsigned) iterations;
+
+- (unsigned) minIterations;
+- (unsigned) maxIterations;
+
+- (void) setDisableDeactivation: (BOOL) disableDeactivation;
+- (BOOL) disableDeactivation;
+
+- (void) setDrawAABBs: (BOOL) drawAABBs;
+- (BOOL) drawAABBs;
+
+- (void) setDebugDraw: (BOOL) debugDraw;
+- (BOOL) debugDraw;
+
+- (void) setDrawContacts: (BOOL) drawContacts;
+- (BOOL) drawContacts;
+
+@end