Problem: JNI can't return buffers
Problem: JNI can't return buffers

Solution: add support for buffer returns

- if fresh = "1", allocates a new jbyteArray, using the 'size'
  property to specify the buffer size.

- if fresh = "0", returns the address of the raw C buffer as a
  long.

Note: we still can't pass that raw long to constuctors.

keent/zproject,hintjens/zproject,eburkitt/zproject,eburkitt/zproject,taotetek/zproject,twhittock/zproject,paddor/zproject,zeromq/zproject,taotetek/zproject,paddor/zproject,taotetek/zproject,twhittock/zproject,paddor/zproject,keent/zproject,zeromq/zproject,asokoloski/zproject,zeromq/zproject,asokoloski/zproject,hintjens/zproject