Print zlib/lz4/lzma library versions in verbose version output

Knowing the version of zlib/lz4/lzma we're linking against is very
useful for debugging issues with those libraries, so print it out in the
verbosity 4 version output.

Also print this information at the top of `playTests.sh`.

tests/playTests.sh

@@ -183,6 +183,7 @@ else
 fi
 
 
+zstd -vvV
 
 println "\n===>  simple tests "