Refactoring to provide matrix support

[Planeshifter]

refactoring:

• support matrix input
• validate.io modules
• README
• tests

general update:

• LICENSE
• Makefile
• dotfiles

Open question: Do we need to handle integer typed arrays like Int8Array which do not support NaN separately?

[kgryte]

Awesome. Thanks for taking the lead on this.

Re: NaN value. So, this gets to the question of whether nan<name> functions should be viewed more as implementations which address the possibility of missing values. If so, then we could go beyond NaN and allow users to provide an option similar to ismissing, which specifies the encoding. In contrast to ismissing, we could make the default check NaN, rather than null.

In essence, the goal with these implementations is provide functions which allow consumers to perform ops directly on their data, rather than filter, create a new data structure, and then run the computation. Your thoughts?

Once we reconcile this, I will more formally review the code.