Documentation changes.

include/PolyVox/RawVolume.h

@@ -36,6 +36,12 @@
 
 namespace PolyVox
 {
+	/**
+	 * Simple volume implementation which stores data in a single large 3D array.
+	 *
+	 * This class is less memory-efficient than the PagedVolume, but it is the simplest possible
+	 * volume implementation which makes it useful for debugging and getting started with PolyVox.
+	 */
 	template <typename VoxelType>
 	class RawVolume : public BaseVolume<VoxelType>
 	{