update bullet so it actually works

Moved the addSourceDirectory for physics/Bullet into the Engine/Source/CMakeLists.txt file that way it can actually appear where we expect it to in the solution explorer.

Engine/lib/bullet/examples/TinyAudio/b3WriteWavFile.h

@@ -0,0 +1,29 @@
+#ifndef B3_WRITE_WAV_FILE_H
+#define B3_WRITE_WAV_FILE_H
+
+// b3WriteWavFile is copied from Stk::FileWvOut/FileWrite
+// See also https://github.com/thestk/stk
+// by Perry R. Cook and Gary P. Scavone, 1995--2014.
+#include <string>
+
+class b3WriteWavFile
+{
+	void incrementFrame(void);
+	void flush();
+
+	struct b3WriteWavFileInternalData* m_data;
+
+	void flushData(int bufferSize);
+
+public:
+	b3WriteWavFile();
+	virtual ~b3WriteWavFile();
+
+	bool setWavFile(std::string fileName, int sampleRate, int numChannels, bool useDoublePrecision = true);
+
+	void closeWavFile();
+
+	void tick(double* values, int numValues);
+};
+
+#endif  //B3_WRITE_WAV_FILE_H