Tracing cython code

[licnep]

hunter.trace() fails to print the source code for cython modules, even when they are cythonized with linetracing enabled (eg. when an exception happens the source code is shown).

Instead of showing the pyx source, hunter currently outputs lines like this:

cythonLib.so:275 line ??? NO SOURCE: SyntaxError("invalid or missing encoding declaration for '/usr/local/lib/python3.5/dist-packages/cythonLib.so'")

[ionelmc]

This is supported now. Note that you need to enable line tracing (see tests/sample5.pyx and tests/setup.py for what I tested with).

[licnep]

Awesome!