Reset yargs to play nicely with documentation-readme

Author: Anand Thakker

lib/args.js

@@ -3,6 +3,7 @@ var documentation = require('../'),
   loadConfig = require('../lib/load_config.js');
 
 var yargs = require('yargs')
+  .reset()
   .usage('Usage: $0 <command> [options]')
 
   .option('f', {