* Fixed file.close() typo in test_vault_editor
* Updated unicode.py to redefine basestring properly in python3 and fixed a couple missed py27 specific code.
* Realized the patch in test_data_loader was still failing cause we are passing the string 'builtins.open' and not actually using it in that file and soe instead of failing in py34 it would fail in py27.
Unfortunately, I wasn't able to fix a bug in the VaultAES in which during
the test_decrypt_1_0 and test_rekey_migration in which VaultAES wasn't successfully
writing the writing the encrypted key to out_file (BytesIO).
Added skipping vault_editor tests test_decrypt_1_0 and test_rekey_migration in python3
since I wasn't able to successfully backport VaultAES without weird bugs.
* moved old unittests for vault over to the new codebase
* reverted YAML error helpers and reverted the load() function
in parsing/__init__.py, pending a rewrite of a new YAML loader
class of some kind to encapsulate all of that
* fixed an error in in the module args parser regarding the shell/
command argument parsing, where some additional arguments were
being lost
