Rename Catalan -> Combinatorics

Author: jiahao

LICENSE.md

@@ -1,6 +1,7 @@
-Catalan.jl is licensed under the MIT License:
+Combinatorics.jl is licensed under the MIT License:
 
-> Copyright (c) 2013: Alessandro Andrioni and other contributors.
+> Copyright (c) 2013-2014: Alessandro Andrioni, Jiahao Chen and other
+> contributors.
 > 
 > Permission is hereby granted, free of charge, to any person obtaining
 > a copy of this software and associated documentation files (the

README.md

@@ -1,8 +1,9 @@
-catalan
-=======
+Combinatorics
+=============
 
-Catalan: a combinatorics library for Julia, focusing mostly (as of now) on enumerative combinatorics and permutations.
-As overflows are expected even for low values, most of the functions always return `BigInt`, and are marked as such below.
+A combinatorics library for Julia, focusing mostly (as of now) on enumerative
+combinatorics and permutations.  As overflows are expected even for low values,
+most of the functions always return `BigInt`, and are marked as such below.
 
 This library provides the following functions:
  - `bell(n)`: returns the n-th Bell number; always returns a `BigInt`;