add examples

Author: jph00

examples/test_fastcore.py

@@ -0,0 +1,8 @@
+#!/usr/bin/env python
+
+from fastcore.script import *
+@call_parse
+def main(msg:Param("The message", str),
+         upper:Param("Convert to uppercase?", store_true)):
+    "Print `msg`, optionally converting to uppercase"
+    print(msg.upper() if upper else msg)