Wrappers: give priority to SYMENGINE_DIR when searching for SymEngine
Wrappers: give priority to SYMENGINE_DIR when searching for SymEngine

bjodah/symengine.py,symengine/symengine.py,symengine/symengine.py,bjodah/symengine.py,symengine/symengine.py,bjodah/symengine.py