Integral refactoring

[fedepedron]

I open this issue for the sake of bookkeeping the process started with #216 and #236. These are, I believe, the steps to be taken:

• Refactor int1 and int1G
• Refactor int2, int3lu, int3mem
• Refactor int2G and int3G (THE HORROR)
• Refactor intsol and intfld
• Refactor intSG and intsolG
• Either move all basis set data (nuc, a, c, d, ncont, nshell, norm) to the faint_module or create a basis_data module to keep these separately.
• Mask aint cpu/gpu usage in outer routines.

[ramirezfranciscof]

Doesn't the basis_data module already exist? Probably doesn't have all the information though...

[fedepedron]

Yeah, I believe it was one of those modules that were like, deprecated from the craddle. Like liosubs I think.

[ramirezfranciscof]

I believe it was one of those modules that were like, deprecated from the craddle

How dare you!

Nah, I'm pretty sure that I use it to calculate the integrals for the forces of ehrenfest.

EDIT: Now because you said that I'm going to mess all over your tick boxes...

[fedepedron]

I'm going to mess all over your tick boxes...

You monster!