Tweaking some CS things.

Signed-off-by: Jason Lewis <jason.lewis1991@gmail.com>
Minor refactoring and keeping things DRY.

Signed-off-by: Jason Lewis <jason.lewis1991@gmail.com>
Allow returning of non-morphable responses like BinaryFileResponse. Fixes #86.

Signed-off-by: Jason Lewis <jason.lewis1991@gmail.com>