* Add python api that generates desciptor(s) from the aligned image(s)
* Remove asserts from face_recognition.py example/tutorial
* In batch_compute_face_descriptors_from_aligned_images, use for-in loop to simplify the code
Improvde the document on binding methods and the error message if the aligned image is not of size 150x150
* 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
Kapil Sachdeva