Add instructions for autotest

doc/autotest_setup

@@ -0,0 +1,19 @@
+# ADD THIS to your ~/.autotest
+
+require 'rubygems'
+require 'growl_glue'
+
+GrowlGlue::Autotest.initialize
+
+Autotest.add_hook :initialize do |at|
+  # Ignore files in tmp/
+  at.add_exception %r%^\./tmp%
+  at.add_exception %r%^\./sass-cache%
+  at.add_exception %r%^\./log%
+  at.add_exception %r%^\./spec/tmp%
+  at.add_exception %r%^\./doc%
+end
+
+
+# RUN `autotest` in order to autotest your specs
+# RUN `AUTOFEATURE=true autotest` in order to autotest your cucumber features