Set site_404 variable to that path in unl module update.

Users will now need to know the specific address to access
the reset form

[gh-524] Change require permissions on Reset Site to 'administer nodes' instead of having to be a global administrator

Mimics sharedcode/% html files that used to exist on static UNL templated sites

[gh-447] Hide administrators at admin/people from non-administrators unless the adiministrator belongs to other roles.

[gh-438] Replace file_get_contents with a wrapper (unl_url_get_contents) that will cache the results based on the requested URL's cache headers.

[gh-124] Add a input filter that allows the embedding of content from nodes inside of nodes by using tags.
[gh-124] Add support for the <!--#include virtual="some/path"--> SSI directive as a filter.

Create a new alias with (new) status code 6. Then when cron runs switch the new alias and the default site path.

Also includes a bunch of cleanup (using vars properly in t(), removing unnecessary fieldsets, etc)

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[gh-312] Merging test into staging

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