Automatically merge wiki references and existing references

I originally had file of references, history.bib, which was the main
BibTeX library in this repository. Now I'm keeping notes in a research
wiki and have not yet imported my BibTeX references into the wiki. So
I've changed history.bib to library.bib. The Makefile now extracts the
references from the wiki, cats them to library.bib, sorts them, and
produces a new history.bib.
Updated readme
Renamed history.bib to master.bib because it makes more sense