ENH: Very naive function for getting disjoint sets A_n
STY: pep8 (why) formatting
BUG: the sparse_grid function doesn't work. It excludes the origin for some reason
NOTE: Added notes in sparse_grid for how we can make it better
CODE:Getting close to finishing the unidimensional disjoint set version.  Pulled out right sets; just need to put them together right.
ENH: sparse_grid now works and is very efficient
GRID: Told sparse grid to not return points and grid; I think we only need grid.
Merge branch 'master' of github.com:sternSargentRA/Smolyak.jl into Python
BUG: Not totally finished with the python.  Very close, but need to troubleshoot sparse_grid.