Require missing libraries and check for defined ActionController constant so ActionView can be used standalone

Consistently use the framework's configured logger and avoid reverting to RAILS_DEFAULT_LOGGER unless necessary.

Signed-off-by: NJoshua Peek <josh@joshpeek.com>

Set the response content type to that of found template if not explicitly set elsewhere [#444 state:resolved]
Signed-off-by: NJoshua Peek <josh@joshpeek.com>

Removed lagacy TemplateHandler#render API. Left in a legacy TemplateHandler and Compilable stub so plugins will not have to change anything.

Signed-off-by: NJoshua Peek <josh@joshpeek.com>

Made ActionView::Base#first_render a little more private. And added _last_render to track the most recent render. Will fix #609 as a side effect. [#609 state:resolved]

Refactor template preloading. New abstractions include Renderable mixins and a refactored Template class.

Changed ActionView::TemplateHandler#render API method signature to render(template, local_assigns = {})

Added local assign keys to compiled method name so two threads evaluating the same template with different locals don't step on top of each other

Lookup compiled methods in CompiledTemplates instance methods set instead of using a "methods_names" hash