Fixed compilation errors with c++14 and missing strdup()

[mortacious]

I fixed some compiler errors on newer c++ standards and added cstring include to the generated code so the compiler finds the strdup() function. This fixed issue #176 for me.

[miatauro-NASA]

Thank you for your contribution! I've pulled the python and cstring commits into the master branch. We're not willing to commit to C++ 11 yet, let alone 14, but I've made C++03-compatible changes based on what you've done here.