Update README.

README.md

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 Squirrel
 =====
 
-"Fork Squirrel" to create a new MOOSE-based application.
-
-For more information see: [http://mooseframework.org/create-an-app/](http://mooseframework.org/create-an-app/)
+Squirrel is a MOOSE library for the Moltres and Zapdos applications, which are
+geared towards molten salt reactor and laboratory low-temperature plasma
+simulations respectively. Though different areas of physics, these applications
+can share common pieces of code. It's only right that the great legendary birds
+rely on the humble squirrel to survive.