Kill off the old 'tests' stuff. Write a ton of new tests for the

'testsuite' dir.  Fix a bunch of broken tests.  Fix the testsuite
'runtest' script so it actually reports all failures and provides
meaningful feedback.
 -Erik

testsuite/mv/mv-removes-source-file

@@ -0,0 +1,4 @@
+touch foo
+busybox mv foo bar
+test ! -e foo
+test -f bar