Add in-place L2 norm difference method

[loganharbour]

No description provided.

[loganharbour]

@roystgnr please

[loganharbour]

@jwpeterson - Roy is looking for your opinions for naming readable() and comparable() in f47a2a3; mind taking a look?

Edit: used the right commit

[jwpeterson]

OK, so the question is just if those are good names for the functions? Seems OK to me, might change comparable -> compatible since the word "comparable" is commonly used in the context of STL strict weak orderings.

[loganharbour]

OK, so the question is just if those are good names for the functions? S

Yep - that's it. We hit some stupid mistakes not understanding a result when we forgot to close, so decided to clean that up here.

might change comparable -> compatible since the word "comparable" is commonly used in the context of STL strict weak orderings.

Works for me.

[loganharbour]

@roystgnr good to go.

[moosebuild]

Job Coverage on 5a0d7a2 wanted to post the following:

Coverage

	c2728e	#3603 5a0d7a
	Total	Total	+/-	New
Rate	61.88%	61.88%	+0.01%	59.26%
Hits	66607	66625	+18	16
Misses	41039	41035	-4	11

Diff coverage report

Full coverage report

Warnings

• New new line coverage rate 59.26% is less than the suggested 90.0%

This comment will be updated on new commits.