Hvac

This is just the highlights, there have been a bunch of changes!

IMPROVEVEMENTS:

* Some AppRole support [GH-77]
* Response Wrapping [GH-85]
* AWS EC2 stuff [GH-107], [GH-109]

BUG FIXES

* Better handling of various error states [GH-79], [GH-125]

Thanks to ianwestcott, s3u, mracter, intgr, jkdihenkar, gaelL,
henriquegemignani, bfeeser, nicr9, mwielgoszewski, mtougeron
for their contributions!

IMPROVEMENTS:

* Add token role support [GH-94]
* Add support for Python 2.6 [GH-92]
* Allow setting the explicit_max_ttl when creating a token [GH-81]
* Add support for write response wrapping [GH-85]

BUG FIXES:

* Fix app role endpoints for newer versions of Vault [GH-93]

Thanks to otakup0pe, nicr9, marcoslopes, caiotomazelli,
and blarghmatey for their contributions!

IMPROVEMENTS:

* Add EC2 auth support [GH-61]
* Add support for token accessors [GH-69]
* Add support for response wrapping [GH-70]
* Add AppRole auth support [GH-77]

BUG FIXES:

* Fix `no_default_policy` parameter in `create_token` [GH-65]
* Fix EC2 auth double JSON parsing [GH-76]

Thanks to blarghmatey, stevenmanton, and ahlinc for their contributions!

IMPROVEMENTS:

* Add methods for manipulating app/user IDs [GH-62]
* Add ability to automatically parse policies with pyhcl [GH-58]
* Add TTL option to `create_userpass` [GH-60]
* Add support for backing up keys on rekey [GH-57]
* Handle non-JSON error responses correctly [GH-46]

BUG FIXES:

* `is_authenticated` now handles new error type for Vault 0.6.0

BUG FIXES:

* Fix improper URL being used when leader redirection occurs [GH-56]

IMPROVEMENTS:

* Add support for Requests sessions [GH-53]

BUG FIXES:

* Properly handle redirects from Vault server [GH-51]