Use Arial as default font

Author: SamyPesse

lib/config_default.js

@@ -77,7 +77,7 @@ module.exports = {
 
         // Font for the file content
         'fontSize': 12,
-        'fontFamily': 'Helvetica',
+        'fontFamily': 'Arial',
 
         // Paper size for the pdf
         // Choices are [u’a0’, u’a1’, u’a2’, u’a3’, u’a4’, u’a5’, u’a6’, u’b0’, u’b1’, u’b2’, u’b3’, u’b4’, u’b5’, u’b6’, u’legal’, u’letter’]