Add pipeline for numpy

[gachiemchiep]

1. Allow Augmentor to generate samples for a list of numpy array and correspoding labels

2. Change output image name from uuid4().extension into oldname_uuid4().extension
   There are several cases where label of image is defined inside image name. So if output image name is a random characters generated by uuid4, this will lead in missing image label.

[mdbloice]

Hi @gachiemchiep thanks a lot for putting so much effort into this, and apologies for the delay responding. I have had teaching duties at work among other things which made January quite difficult to find time for Augmentor. Anyway, right now I am working on some major changes to Augmentor, including the ability to pass multiple images simultaneously through the pipeline for image/gold truth augmentation. I would therefore like to merge your code with the new version once I've updated it. Which I think will be next week some time. I will take into account the changes you have made here into how I go about implementing this, so that we can include your functionality too. Thanks again for making the PR!

[gachiemchiep]

Hi @mdbloice . Augmentor is great tool. It did help my work a lot. Hope you release the new update soon.
Best regard