builds and passes tests on linux

Code/ChemicalFeatures/CMakeLists.txt

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+rdkit_library(ChemicalFeatures FreeChemicalFeature.cpp)
+
+rdkit_test(testChemicalFeatures testChemicalFeatures.cpp 
+           LINK_LIBRARIES ChemicalFeatures RDGeneral)
+
+add_subdirectory(Wrap)
+
+
+

Code/ChemicalFeatures/Wrap/CMakeLists.txt

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+rdkit_python_extension(rdChemicalFeatures 
+                       rdChemicalFeatures.cpp FreeChemicalFeature.cpp
+                       DEST Chem
+                       LINK_LIBRARIES
+                       ChemicalFeatures GraphMol RDGeometry RDGeneral RDBoost) 
+
+add_test(pyFeatures python ${CMAKE_CURRENT_SOURCE_DIR}/testFeatures.py)
+
+
+