Buzz version fix

The specific version of Buzz this had as a dependency was quite dated, and was causing problems with other libraries. Error handling in Buzz was changed at 0.7, so a lot of other libraries specify 0.7+. There isn't anything here that is incompatible with 0.3+, so I have updated the dependency to make it as flexible as possible.

I also fixed a little error in a doctag to help with code completion.