change :http-method to :request-method and v1.0.1
improve handling of sub-map insert + cut v1.0.2
namespace refactoring + some new tests + v1.0.3
(lookup-context [key]) on site-node for hierarchical/prototypical lookup of context

- implemented error handling in terms of this so it can be overriden at any level in a sitemap
- also implemented lookup of :birdseye/default-handler in this way
v1.0.4