demo/verbose.should: test verbose output

closes #60 and #61

demo/verbose.should

+# should can have different levels of verbosity
+
+
+./should demo/json.should
+
+# Show summary, but do not show passed tests
+r:==> ok .* total:.. tests
+0:tests are on the keys
+
+
+./should -v demo/json.should
+
+# Show summary and show passed tests, with details
+r:==> ok .* total:.. tests
+:tests are on the keys
+:numbers[3].meaning
+r:numbers\[3\].meaning .*42
+
+
+
+
+
+./should -v demo/hello.should
+
+# Do not show stdout
+l0:------------ hello, world ------------
+
+
+./should -vv demo/hello.should
+
+# Show stdout 
+l1:------------ hello, world ------------
+