sip import raises compatibility problems

[draperjames]

This is issue link to PR #30

Test current qtpy fix in the following;

- [x] Py35 PyQt4
- [ ] Py35 PyQt5
- [ ] Py34 PySide
    -[ ] without zeex
    -[ ] with zeex
- [ ] Py27 PyQt4
- [ ] Py27 PyQt5

We could also configure travis.ci to do all of this but that is easier said than done. I'm thinking about rigging out a virtual box with some standard parameters so I can actually understand how linux works.
I'll add in more stuff on all this later.