fixed RFC 7230 compliance bugs in Mojo::Headers
bump version
renamed section about optional placeholders in routing guide
documentation tweaks
added reset methods to a few classes
better timer tests
make sure reset stops the event loop
reuse more code
added another layer to the template inheritance example
mention stash values
do not end error messages with a dot
bump version
returning undef is a feature
mention that content is wrapped in a Mojo::ByteStream object
more consistent formatting
use $c and $app instead of $self in many places
do not use $self for callbacks
mention renaming $c to $self in growing guide
improved .ep templates to make the current controller available as $c
mention $self in rendering guide