Fixed comments and rand API

lib/mersenne.js

@@ -1,5 +1,5 @@
 // this program is a JavaScript version of Mersenne Twister, with concealment and encapsulation in class,
-// an almost straight conversion from the original program, this.mt19937ar.c,
+// an almost straight conversion from the original program, mt19937ar.c,
 // translated by y. okada on July 17, 2006.
 // and modified a little at july 20, 2006, but there are not any substantial differences.
 // in this program, procedure descriptions and comments of original source code were not removed.
@@ -8,7 +8,7 @@
 // lines commented with // are additional comments in this JavaScript version.
 // before using this version, create at least one instance of MersenneTwister19937 class, and initialize the each state, given below in c comments, of all the instances.
 /*
-   A C-program for this.mt19937, with initialization improved 2002/1/26.
+   A C-program for MT19937, with initialization improved 2002/1/26.
    Coded by Takuji Nishimura and Makoto Matsumoto.
 
    Before using, initialize the state by using init_genrand(seed)
@@ -46,7 +46,7 @@
 
 
    Any feedback is very welcome.
-   http://www.math.sci.hiroshima-u.ac.jp/~m-mat/this.mt/ethis.mt.html
+   http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html
    email: m-mat @ math.sci.hiroshima-u.ac.jp (remove space)
 */
 
@@ -263,14 +263,14 @@ exports.MersenneTwister19937 = MersenneTwister19937;
 //  Export a simplified function to generate random numbers
 var gen = new MersenneTwister19937;
 gen.init_genrand((new Date).getTime() % 1000000000);
-exports.randInt = function(N) {
+exports.rand = function(N) {
     if (!N)
         {
         N = 32768;
         }
     return Math.floor(gen.genrand_real2() * N);
 }
-exports.rand = function() {
+exports.randReal = function() {
     return gen.genrand_real2();
 }
 exports.seed = function(S) {