* Fixed reference count issue
* Fixed refcount issue in Python dlib.jitter_image and dlib.get_face_chips
* Consolidation of https://github.com/davisking/dlib/pull/1249
* Fixed build issue
* Fixed: Paths in a pytest file should be relative to dlib root
* Skip numpy return tests for Python 2.7 or if Numpy is not installed
* Enabled numpy returns tests on Python 2.7 using cPickle.dumps
In particular, these new functions don't need to be inside the face
recognition class. So I moved them out. I also fixed many incorrect
copy/pasted comments and clarified parts of the example code.
Davis King