Extra FindSomething

• FFTW
• MKL
• Julia
• Mako. Installs it to ${PROJECT_BINARY_DIR}/external/python if it is not found.
• CFitsIO
• Numpy, also tests whether
  • PyArray_ENABLEFLAGS exists
  • NPY_ARRAY_C_CONTIGUOUS vs NPY_C_CONTIGUOUS macros
  • npy_long_double exists and is different from npy_double
  • npy_bool exists and is different from npy_ubyte
• NumpyMKL: MKL libraries linked to by Numpy. For unixes only.
• CoherentPython: Looks for a consistent set of python interpreter and libraries.