switch off gzip/zlib iostreams for now -- we're not using it
don't do perf tests on windows, some includes not available yet it seems
use PGPOINTCLOUD=ON in my default configuration (based on OSGeo4W
don't do conninfo parse if we don't have it (old libpq's). Fixes #169
Merge branch 'master' into issues/167-fixups-for-chipper