Created source code for persistent login cookies.
Bug fixes:
* No more sudden errors.
* Persistent login now off by default.
Added database updates and package info.
Updated account component:
* Added "remember me" button.
Updated README, CHANGES and package info.
Merge branch 'master' into persistent-login-cookie

Conflicts:
	CHANGES.md
	README.md
	mokuji/.package/DBUpdates.php
	mokuji/.package/package.json
Tweaked persistent login cookie update.
 * Replaced duration value with a constant.
 * Updated phpdoc-md tool to display proper comments for the constant.
 * Updated APIdocs.