Explicitly add the LICENSE file for lack of confusion

License was previously valid due to being linked from the Admin License link, and included in a URL from zp-core/licence.php. However, this inclusion clears up any confusion about the licensing terms.
Changes to the Zenpage option to disable news or pages: Instead of a class property we now use constants since those are global options. Official themes are also setup to not only hide but to generally block disabled items.
Merge remote-tracking branch 'upstream/master' into upstream0807

Conflicts:
	themes/effervescence+/news.php
	themes/effervescence+/pages.php
	themes/effervescence+/sidebar.php
	themes/garland/news.php
	themes/garland/pages.php
	themes/garland/sidebar.php
	themes/zenpage/archive.php
	themes/zenpage/gallery.php
	themes/zenpage/index.php
	themes/zenpage/news.php
	themes/zenpage/pages.php
	themes/zenpage/sidebar.php
	themes/zpmobile/archive.php
	themes/zpmobile/functions.php
	themes/zpmobile/news.php
	themes/zpmobile/pages.php
	zp-core/admin-globals.php
	zp-core/zp-extensions/zenpage.php
	zp-core/zp-extensions/zenpage/classes.php

	new file:   LICENSE
	modified:   zp-core/zp-extensions/zenpage/classes.php