Allow callers to override :host, :port, and :scheme when generating urls
Add :absolute? key to url-for options, to force absolute URL
:absolute? key also forces scheme
Add tests for new linker capabilities
Flatten overrides in url-for to be top-level keys
Merge pull request #215 from pedestal/fix-linker-scheme

Allow callers to override :host, :port, and :scheme when generating urls
Correct spelling mistakes in app-template and app

Fix tests that broke from spelling correction
Merge pull request #221 from danielcompton/fix-spelling

Correct spelling mistakes in app-template and app
add a test for context :binding's behavior
Merge pull request #223 from pedestal/add-binding-test

add a test for context :bindings' behavior