example: import a set of example files

Expectation is that people will copy these, so I've tried to make them nice
and easily customizable.
cvlib.py: don't path-search for toplevel templating

Doesn't really make sense to restrict things that way.
README.md: more writing
cvlib.py: remove pointless distincation between yjvi and yjvp
cvlib.py: durrr, dramatically clarify generation of citation text
cvlib.py: fix a hardcoding of personal information
cvlib.py: remove the MARKUP directive and a bunch of now-unneeded code
cvlib.py: a little cleanup in cite_info
cvlib.py: better variable naming in cite_info
Rework how citations are done

I found a way to just write the citation text directly that gives acceptable
results in both PDF and online formats. Acceptable to my preferences, at
least. This cleans up one of the lingering gross spots in the processing.
README.md: update