Merge branch 'release-0.15.1' into develop

* release-0.15.1:
  Bumping version to 0.15.1
A bunch of PEP8 cleanups and getting rid of unused imports and variables.
Support xmlattribute in parameters when generating XML payload.  Fixes #239.
Updating to latest public model for EC2.
Updating the xml namespace for all EC2 responses.
Merge branch 'issue-239' of git://github.com/garnaat/botocore into garnaat-issue-239
This fix will use path-style addressing for all bucket names containing periods but will require users to know the correct endpoint to connect to.
A couple of small tweaks.  Have response.py import the json module from botocore.compat.  Have the docs generate a man.3 file rather than a man.1.
Bumping version to 0.16.0
Merge branch 'release-0.16.0'

* release-0.16.0:
  Bumping version to 0.16.0
  A couple of small tweaks.  Have response.py import the json module from botocore.compat.  Have the docs generate a man.3 file rather than a man.1.
  This fix will use path-style addressing for all bucket names containing periods but will require users to know the correct endpoint to connect to.
  Updating the xml namespace for all EC2 responses.
  Updating to latest public model for EC2.
  Support xmlattribute in parameters when generating XML payload.  Fixes #239.
  A bunch of PEP8 cleanups and getting rid of unused imports and variables.