Fix output of hy2py on Python 3.

Closes hylang#535.

bin/hy2py

@@ -1,6 +1,7 @@
 #!/usr/bin/env python
 from __future__ import print_function
-from hy.importer import (import_file_to_ast, import_file_to_hst)
+
+from hy.importer import import_file_to_ast, import_file_to_hst
 
 import argparse
 import sys
@@ -25,15 +26,15 @@ options = parser.parse_args(sys.argv[1:])
 
 if options.with_source:
     hst = import_file_to_hst(options.args[0])
-    print(str(hst).encode("utf-8"))
+    print(hst)
     print()
     print()
 
 _ast = import_file_to_ast(options.args[0], module_name)
 if options.with_ast:
-    print(astor.dump(_ast).encode("utf-8"))
+    print(astor.dump(_ast))
     print()
     print()
 
 if not options.without_python:
-    print(astor.codegen.to_source(_ast).encode("utf-8"))
+    print(astor.codegen.to_source(_ast))