make an empty body [] not [undef]
fixed spelling tests
Added docs explaining missing route for /go_here

Signed-off-by: John Napiorkowski <jjnapiork@cpan.org>
documentatin updates
document deprecations, refactor finalize body a bit
warn if modifying headers afer finalizing them
new middleware
Merge branch 'runner' of https://github.com/perl-catalyst/catalyst-runtime into runner

Conflicts:
	lib/Catalyst/Response.pm