Add SloppyJoes to emulator fitting

[mclaughlin6464]

SloppyJoes ( a 2nd optimizer I wrote in python for a class project) is way better at fitting then the shitty scipy functions. However, it requires a weird format to run. It doesn't take a likelihood, and instead takes the residuals which george won't hand over easily. However it'll probably save this issue we have of poor performance in that regard.

[mclaughlin6464]

I've decided this is a poor idea. I don't want to have this many dependencies for pearce, especially for my own sloppy code (no pun intended).