Update .gitignore
Nits and optimizations
Gaussian.kern
FMMTL_WITH_CUDA rather than FMMTL_NO_CUDA
Blocked P2P optimizations
Adding contributors
Revert README and add bug notes
Update README.md
Create TODO.md
Moving TODO
extending function traits
reorganizing file structure
GPU Fix
BiotSavart kernel... expansion soon.
Nits
Fixes and improvements to tree
LaplaceSpherical2 optimizations
GPU Fix
BiotSavart with GPU
Laplace Expansion nits