Added default configuration for Keystone auth plgn
[WIP] Keystone authN strategy

DO NOT USE!
[WIP] Updated KeystoneStrategy

NOT TESTED!
Minor fixes and clean-up for KeystoneStrategy
Monkey-patched failing routing tests (partially)

thx, to @ffeldhaus and @seanwalbran

See https://gist.github.com/seanwalbran/4643140
Minor dep updates
Fixed the first batch of routing tests

* Fixed DELETE
* Fixed partial updates on POST
Fixed attr handling in ONE templates

* Fixed attributes on standalone links
* Changed handling of attributes in templates ('_' instead of '!')
Fixed a typo in ONE backend (in attach_storage)