fn: support for functions testing (#379)

* fn: add test framework

* fn: make routes creation smarter

* fn: add testframework examples

* fn: remove unnecessary dependency

* fn: update doc

* fn: fix consistenty between runff, runlocaltest and runremotetest

fn/main.go

@@ -33,6 +33,7 @@ ENVIRONMENT VARIABLES:
 		push(),
 		routes(),
 		run(),
+		testfn(),
 		version(),
 	}
 	app.Run(os.Args)