Enhance/vectorize

[facelessuser]

Add vectorize method to quickly create functions to operate on matrices. Additionally, add a second vectorized (vectorize2) method that is specialized with speed-ups for our most common cases. Use it to generate our general purposed methods: add, subtract, multiply, etc.

Additionally, add a faster path in broadcast for simple cases, matrices below dimensions of 3 and broadcast of a single matrix.

Some small cleanups for performance were generally made in the algebra lib as well.

[facelessuser]

Test coverage needs updating to cover new edge cases that we now cover and to exercise both the simple broadcast path and the more general purpose broadcast path.

[facelessuser]

@gir-bot lgtm