fix args.py import error

args.sh fails 

Traceback (most recent call last):
  File "unicode.py", line 14, in <module>
    from clint import args
ImportError: cannot import name args

examples/unicode.py

@@ -11,10 +11,12 @@ try:
 except:
     import simplejson as json
 
-from clint import args
+from clint.arguments import Args
 from clint import piped_in
 from clint.textui import colored, puts, indent
 
+args = Args()
+
 if __name__ == '__main__':
 
     puts('Test:')