Moved test code to tex file

I found a better workflow in writing a TeX file that has the style file
in it (using filecontents) and then compiling right from there.

When I am ready to start documenting my stuff for the real thing, I will
use the recently-discovered-by-me `stydtx` Perl script.
Merge branch 'master' of http://github.com/vermiculus/ltx3obj