first commit, largely copied volunteers

Guardfile

@@ -0,0 +1,8 @@
+
+
+guard :minitest do
+  # with Minitest::Unit
+  watch(%r{^test/(.*)\/?(.*)_test\.rb$})
+  watch(%r{^lib/(.*/)?([^/]+)\.rb$})     { |m| "test/#{m[1]}#{m[2]}_test.rb" }
+  watch(%r{^test/test_helper\.rb$})      { 'test' }
+end