devel/py-gdbgui: Add devel/py-gdbgui and dependencies to the tree.
gdbgui is a browser-based frontend to gdb (gnu debugger).
Dependencies are:
py-pygdbmi, Parse gdb machine interface string output and return data types.
py-pypugjs, PyPugJS is just a fork of PyJade with the name Jade changed.
py-python-socketio, Python implementation of the Engine.IO realtime server.
py-python-engineio, Python implementation of the Socket.IO realtime server.
py-enum-compat, A virtual package, its whole purpose is to install enum34.
py-flask-socketio, Socket.IO integration for Flask applications.

Reviewed by: feld, mat
Approved by: feld, mat (mentors)
Differential Revision: https://reviews.freebsd.org/D9849