Install composer viea phive and remove phpunit from composer dev install

Update comoser test files to work with both, but primary is the phive
installed one.

run tests via 4dev/check/phpunit.sh as before

4dev/tests/bootstrap.php

@@ -0,0 +1,5 @@
+<?php
+
+require dirname(__DIR__) . '../../www/vendor/autoload.php';
+
+// __END__