Documentation fixes

Release 2.22

Use run_method to run template method in Kelp::Response

Add run_method to Kelp::Context

Release 2.21

Add perldoc browser as an example script

Document KelpX::Controller as the modern alternative to reblessing

Validate Perl package name, improve help synopsis

Move bench script to tools directory, which is removed in dist

Improve Routes module docs

Minor simlification to dispatch code

Improve Kelp::Response docs

Release 2.20

Remove deprecated json_param behavior

Croak instead of warning when using bad data in route building