Added stale?/fresh? and fresh_when methods to provide a layer of abstraction above request.fresh? and friends [DHH]

Add tests too.

Commit 8aad8c claimed to do this, but it checks for the 304 status too early, before handle_conditional_get! has overridden it.

[#958 state:resolved]
Signed-off-by: NJonathan del Strother <jon.delStrother@bestbefore.tv>
Signed-off-by: NJeremy Kemper <jeremy@bitsweat.net>

Return nil instead of a space when passing an empty collection or nil to 'render :partial' [#791 state:resolved]
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>

Tighten the rescue clause here to prevent hiding strange mock related errors behind the line offset test

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Reapply the TemplateFinder first applied in [8669] then reverted in [8676]. Closes #10800 [lifofifo]


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Refactor the default rendering out to a method called default_render to provide a hook for plugin authors.  Closes #9953 [cjheath]


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Fixed JSON encoding to use quoted keys according to the JSON standard (closes #8762) [choonkat/chuyeow]

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Send freshness information when sending Etags.  Without this internet explorer will not send conditional gets for a resource, but instead hold on to the responses for the current browser session.


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Added :location option to render so that the common pattern of rendering a response after creating a new resource is now a 1-liner [DHH]

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The default respond_to blocks don't set a specific extension anymore, so that both 'show.rjs' and 'show.js.rjs' will work. [Rick]

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Change ActionView template defaults.  Look for templates using the request format first, such as show.html.erb or show.xml.builder, before looking for the old defaults like show.erb or show.builder [Rick]

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