Fix scc version post-yacliw integration

Closes #171.

`scc version` should now be displayed as part of Travis. Additionally, after activating a virtual environment, install the development scc via

```
pip install -r requirements
python setup.py install
```

Then from anywhere else on the path (to skip the `git describe` logic), check the version commands are returning the correct output

```
yaclifw version
scc version
```