Fixed install prefix for package building

Author: kpeeters

config/buildpkg.sh

@@ -16,7 +16,7 @@ if [ -f /etc/redhat-release ]; then
       cmake .. -DPACKAGING_MODE=ON -DCMAKE_INSTALL_PREFIX=/usr
    fi
 else
-   cmake ..
+   cmake .. -DCMAKE_INSTALL_PREFIX=/usr
 fi
 make
 sudo cpack

core/SympyCdb.cc

@@ -11,7 +11,7 @@
 
 using namespace cadabra;
 
-//#define DEBUG
+// #define DEBUG
 
 Ex::iterator sympy::apply(const Kernel& kernel, Ex& ex, Ex::iterator& it, const std::vector<std::string>& wrap, const std::string& args, 
 								  const std::string& method)