added bibliography style for Conference Proceedings

first try, not sure if it works
improved styling for book chapter and added styling for conference paper

Human Mutation does not provide details on how to style a conference paper. My solution is pretty basic (no publisher info etc).
changed title and id back to original
fixed indent
changed journal article bibliography styling to show short journal title
removed accidentally added dashes
Merge pull request #616 from azankl/master

improved book chapter and journal article style, added conference paper style