Overhauled

Major overhaul from v1! Learned OOP in MATLAB, learned Docker, learned to not have large, unwieldy shell scripts. The motivation was the aforementioned reasons, and also to move our workflow from a single dedicated workstation running a VM with all necessary software to one that can run on a given workstation (in the context of our lab's setup).

In this release, the pipeline is currently envisioned to no longer be a single CLI tool (maybe in a later update or new version??), making for more user input steps. However, the code is:
* more robust (a lot more & better argument validation)
* easier to debug
* easier to revise
* more OS agnostic (with use of Docker)

Initial Release

ASL processing pipeline.
Main code written in Bash with underlying MATLAB code as needed.