Fix reading options directory

Author: tonyganch

lib/csscomb.js

@@ -158,7 +158,7 @@ function getDetectedOptions(detected, handlers) {
  * @name CSScomb
  */
 var CSScomb = function(config) {
-    var options = fs.readdirSync('./lib/options').map(function(option) {
+    var options = fs.readdirSync(__dirname + '/options').map(function(option) {
         return require('./options/' + option);
     });
 
@@ -286,7 +286,7 @@ CSScomb.detectInString = function detectInString(text, options) {
 
     if (!text) return text;
 
-    var optionNames = fs.readdirSync('./lib/options');
+    var optionNames = fs.readdirSync(__dirname + '/options');
     optionNames.forEach(function(option) {
         option = option.slice(0, -3);
         if (options && options.indexOf(option) < 0) return;