README with CMake

README

 To compile and install the library with CMake:
 $ mkdir build; cd build;
 $ cmake -DCMAKE_CXX_FLAGS="-Wall -Wdeprecated-declarations" -DNOMAD=ON -DCAMEO=ON -DGNUPLOT=ON -DCAMEO_ROOT=/users/legoc/cameo-master/local-test/ ..
-$ cmake --build .
\ No newline at end of file
+$ cmake --build .