Change the value of :redirect-after-html-post in the resource map from being a URI string to being a function of the ring request that returns a URI string. This is to support the ability to return a URI string that is knowable at request processing time but not resource creation time.
Added github enhancement #1: change value of resource key
:redirect-after-html-post from URI string to a function of the Ring
request. Clean up and add to the comment doc in resource.clj. Bumped
version to 0.1.3 as this is a breaking API change.
Fixed broken test due to fix for github issue #1.