CYA: Add 3-clause BSD with normal disclaimer
CYA: Add 3-clause BSD with normal disclaimer

This adds a normal BSD 3-clause "New" or "Revised" License under my copyright,
out of concern that the Yahoo BSD License doesn't include
non-Yahoo contributors in its liability disclaimer.

Compare:
    Normal BSD License (emphasis added):
        > IN NO EVENT SHALL THE COPYRIGHT HOLDER **OR CONTRIBUTORS** BE LIABLE
    Yahoo BSD License:
        > IN NO EVENT SHALL YAHOO! INC. BE LIABLE

The Yahoo BSD License is of the same 3-clause/New/Revised flavor as
the one I'm adding, so there should be no additional repercussions.

cvrebert/css-mq-parser