Bibliography Management

Switch from BibTeX to BibLaTeX as a bibliography formatter.  BibLaTeX uses biber, widely regarded as the successor of BibTeX, as its backend.  While this does introduce a new dependency, BibLaTeX and biber are included in most modern LaTeX distributions.

I also cleaned up and removed a few files in the main directory.
TODO: modify the makelab and makevol scripts to use biblatex + biber.