Added click a new cli to the cli page

docs/scenarios/cli.rst

@@ -11,6 +11,14 @@ filled with very useful tools for developing commandline applications.
 It supports features such as; CLI Colors and Indents, Simple and Powerful
 Column Printer, Iterator based progress bar and Implicit argument handling.
 
+Click
+-----
+
+`click <http://click.pocoo.org/>`_ is a Python package for creating beautiful 
+command line interfaces in a composable way with as little amount of code as 
+necessary. It’s the “Command Line Interface Creation Kit”. It’s highly 
+configurable but comes with good defaults out of the box.
+
 docopt
 ------