Added Chase's interpolation routines under ./gspy/interp. Also added some TODO's in cublicspline2d.py
Added interp.py file with class with 2d cubic spline class.

Signed-off-by: Spencer Lyon <spencerlyon2@gmail.com>
added beginning of numb class for interpolation

Signed-off-by: Spencer Lyon <spencerlyon2@gmail.com>
added hit call for inner function in interp_numa.py

Signed-off-by: Spencer Lyon <spencerlyon2@gmail.com>
Added come comments in interp_numba.py
Added comment about extra args in __init__
Update gspy/interp_numba.py
made the interpolation function return things in the order we thought it was
deleted unnecessary line.
Fixed 1dinterp solver, tridiag was giving error
Updated interp code.
Updated interp_numba.py. Still working on it

Signed-off-by: Spencer Lyon <spencerlyon2@gmail.com>
Merge branch 'StreamlinedAltInterp' of github.com:dgevans/Golosov-Sargent into StreamlinedAltInterp
Tried to do more work on numbaizing the interpolation.

Signed-off-by: Spencer Lyon <spencerlyon2@gmail.com>
Merge branch 'StreamlinedCode' of github.com:dgevans/Golosov-Sargent into StreamlinedAltInterp
Merge branch 'StreamlinedAltInterp' of https://github.com/dgevans/Golosov-Sargent into StreamlinedAltInterp
fiddled with the tridiag solver
Finished runsimulations file.
Merge branch 'StreamlinedCode' of github.com:dgevans/Golosov-Sargent into StreamlinedAltInterp
Added gradient method for the spline interpolator.