Include instructions on how to run brutus

[davehouser1]

I tried pip installing, as well as installing via the setup.py script, but its not clear how to run brutus. I see nothing in my path either. Where is brutus installed? How do I run it?
Maybe some examples on how to run it as well would be helpful.

[joshspeagle]

Examples of usage can be found under demos in the notebooks labelled from 0-6. The install location is the same as other packages installed via pip under the name astro-brutus.

As this is a repeat of a previous issue (this is currently on the to-do list under #29), I'll close this one for now. I can re-open it if you have a particular issue that you don't think is addressed in the notebooks.