Added test for Request. Small fixes.
Removed 0.6 support.
Merge pull request #56 from alexindigo/master

Added test for Request. Small fixes.
Added custom headers support

Make it possible to send additional customs headers when submitting the
form. Most of the code was already there but it wasn’t used
Added test for the custom header functionality
Documented custom headers option
Merge pull request #60 from sqreept/master

Added custom headers support
Updated versions.
Merge pull request #69 from alexindigo/up

Updated versions.