dispatch responds to changes of path_info by before_request hooks
counter-fix for Issue #181
add Test::MockTime to test dependencies

... and make the test skip if the module is not present

Fixes issue #182
Merge branch 'gh-182'
Merge branch 'pr/181'
add content_type as one of the dancer_response options
Fix a typo
Merge pull request #185 from tomhukins/patch-1

Fix a typo in the README.