Remove built *.js file from repo

.gitignore

@@ -1,2 +1,3 @@
 .DS_Store
-node_modules
+node_modules
+lib/*

.npmignore

@@ -0,0 +1,2 @@
+.DS_Store
+node_modules

lib/base58.js

@@ -1,45 +0,0 @@
-(function() {
-  var Base58;
-
-  Base58 = (function() {
-
-    function Base58() {
-      this.alphabet = "123456789abcdefghijkmnopqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ";
-      this.base = this.alphabet.length;
-    }
-
-    Base58.prototype.encode = function(num) {
-      var mod, str;
-      if (typeof num !== 'number') {
-        throw new Error('Value passed is not a number.');
-      }
-      str = '';
-      while (num >= this.base) {
-        mod = num % this.base;
-        str = this.alphabet[mod] + str;
-        num = (num - mod) / this.base;
-      }
-      return this.alphabet[num] + str;
-    };
-
-    Base58.prototype.decode = function(str) {
-      var char, char_index, index, num, _len, _ref;
-      num = 0;
-      _ref = str.split(/(?:)/).reverse();
-      for (index = 0, _len = _ref.length; index < _len; index++) {
-        char = _ref[index];
-        if ((char_index = this.alphabet.indexOf(char)) === -1) {
-          throw new Error('Value passed not a valid Base58 string.');
-        }
-        num += char_index * Math.pow(this.base, index);
-      }
-      return num;
-    };
-
-    return Base58;
-
-  })();
-
-  module.exports = new Base58();
-
-}).call(this);