Merge pull request #1 from gauthierm/composer

Add composer support.

composer.json

@@ -0,0 +1,22 @@
+{
+	"name"        : "pear/math_biginteger",
+	"description" : "Pure-PHP arbitrary precission integer arithmetic library. If GMP or BCMath are available they are used.",
+	"type"        : "library",
+	"keywords"    : [ "integer", "arbitrary", "precision", "bcmath", "gmp" ],
+	"homepage"    : "https://github.com/pear/Math_BigInteger",
+	"license"     : "LGPL-2.1+",
+	"authors"     : [
+		{
+			"name"  : "Jim Wigginton",
+			"email" : "terrafrost@php.net"
+		}
+	],
+	"require" : {
+		"php"      : ">=4.2.0",
+		"ext-pcre" : "*"
+	},
+	"suggest" : {
+		"ext-bcmath" : "Allows using the BCMath extension internally for computation. Faster than native implementation.",
+		"ext-gmp"    : "Allows using the GNU Multiple Precision extension internally for computation. If you are doing a lot of computation this is the recommended extension."
+	}
+}