Imported Healpix, cfitsio, cosmotool. Added cmake tool to build dependencies (cfitsio, hdf5, netcdf, boost, healpix, gsl, ..). Adjusted CMakeLists.txt

external/cosmotool/sample/test_fft_calls.cpp

@@ -0,0 +1,12 @@
+#include "fourier/euclidian.hpp"
+
+using namespace CosmoTool;
+
+int main()
+{
+  EuclidianFourierTransform_2d<double> dft(128,128,1.0,1.0);
+
+  dft.realSpace().eigen().setRandom();
+  dft.analysis();
+  return 0;
+}