Easy install and multiprocessing

1. atlas.py is made to accept outPrefix instead of outDir, supports debug mode
2. Added support for old MeasureImageSimilarity
3. dcm2niix is included

Smooth installation on Centos7 environment

1. Lightweight btool
2. All processes are parallelized
3. Omitted mysterious gxx, gcc compilers from conda
4. Comes with test data

License and citation update

Slicer/BWH license added
Citation updated

Python 3 compatible

Neat documentation
Revised installation instruction
Atlas-based masking parallelized
Tract-summarize fixed
Inclusion of test data

Initial release

v1.0

Web artifact induced error fixing