added method to change content type and added .gitignore
actually added change content feature
added import mimetypes
cleaned up method a bit.
excluded my .gitignore
Fixed some pep-ish issues as well as defined failure better.
Fixed some pep-ish issues as well as defined failure better.
changed return
changed the content-type return again and added a unit test.
Added a unit test for content-type method.
removed a stray space...
Merge pull request #29 from ExtremeSitting/change-content-type

Feature addition: Change content-type