Add config for the Travis CI Framework
Disable CI for pypy, as it doesn't work yet
Merge 'moredread/master' from pull request 5 by Moredread

on github: https://github.com/aepsil0n/event/pull/5
Merge pull request \#4 from 'coldfix/fix-descriptor'

https://github.com/aepsil0n/event/pull/4
Add link to Travis CI page to readme
Perform mere cosmetics in a couple of places

Only adjusts the layout of some docstrings to my subjective aesthetic
pleasing.