cmake/modules/FindNUMPY.cmake: Removed unneeded comment.
cmake/modules/FindNUMPY.cmake: Changed to reflect that NumPy is a required dependency.
cmake/modules/FindNOSE.cmake: Created to find nose for testing. Optional dependency only needed for `make check`.
CMakeLists.txt: Find nose, if possible.
Revert "cmake/modules/FindNUMPY.cmake: Changed to reflect that NumPy is a required dependency."

This reverts commit 74119d1d70dba97637be01dae412f6efa45b065a.
cmake/modules/FindNUMPY.cmake: Changed to show results.
cmake/modules/FindNUMPY.cmake: Fixed how NumPy handles required nature.
cmake/modules/FindNOSE.cmake: Removed lingering NumPy references.