Allow `Content-Type` header value be of ContentType class
Merge pull request #54 from mailgun/maxim/fix

Allow `Content-Type` header value be of ContentType class
Fix doc strings
Make EmailAddress.display_name to be a arbitrary string
Merge pull request #53 from mailgun/maxim/develop

Make EmailAddress.display_name to be an arbitrary string
Store raw header values to preserve encoding
Do not decode FallbackMimeHeaders
Merge pull request #24 from mailgun/rjones/header-fix

Store raw header values to preserve encoding
Merge branch 'master' into stable

Conflicts:
	setup.py