API Changes and DECam model (Pre-release)

DECam model and additional feature for training API

JOSS paper release version

JOSS paper release version. No changes to code from v0.1.5.

v0.1.5

This version include the following changes:

1. Added deepCR.train module for automated model training.

Tutorial for training a new model is included in read the docs.

arXiv release version

Updated docs & improved segmentation semantics.

v0.1.3

Pre-release version corresponding to the submission of the arXiv/AAS Journals paper.