Merge pull request #20 from frekw/master

Bumped knox version to add support for putFile and S3 regions other than US.
refactor. fixes #21
Release 0.1.7
Support for both image/jpg and image/jpeg as content type

Different clients use this differently...
Merge pull request #22 from rubenstolk/patch-2

Support for both image/jpg and image/jpeg as content type
Can't declare a variable that already exists in context
Merge pull request #23 from rubenstolk/patch-3

Can't declare a variable that already exists in context
add missing comma - bug fix
update dependencies
Release 0.1.8