* java/nio/Buffer.java
	(cap, lim, pos, mark): Made private
	(Buffer): Added package private constructor.
	* java/nio/ByteBuffer.java
	(ByteBuffer): Implements Cloneable.
	(offset): New member variable.
	(readOnly): New member variable.
	(backing_buffer): New member variable.
	(allocateDirect): Throw exception and tell that direct buffers are
	not supported yet, documentation added.
	(allocate): Documentation added.
	(wrap): Documentation added.
	(ByteBuffer): New constructor.
	(hasArray): New method.
	(array): New method.
	(arrayOffset): New method.
	(get): Documentation added.
	(put): Documentation added.
	* java/nio/CharBuffer.java
	(CharBuffer): New constructor.
	(compareTo): Don't access member variables of Buffer directly.
	* java/nio/DoubleBuffer.java
	(allocateDirect): Throw exception and tell that direct buffers are
	not supported yet.
	* java/nio/FloatBuffer.java
	(allocateDirect): Throw exception and tell that direct buffers are
	not supported yet.
	* java/nio/IntBuffer.java
	(allocateDirect): Throw exception and tell that direct buffers are
	not supported yet.
	* java/nio/LongBuffer.java
	(allocateDirect): Throw exception and tell that direct buffers are
	not supported yet.
	* java/nio/MappedByteBuffer.java
	(MappedByteBuffer): New method.
	(force): New method.
	(isLoaded): New method.
	(load): New method.
	* java/nio/ShortBuffer.java
	(allocateDirect): Throw exception and tell that direct buffers are
	not supported yet.

From-SVN: r62685