Added small improvement to the _remove_evil_attributes function

Signed-off-by: brian978 <dbrian89@yahoo.com>
Signed-off-by: Wes Baker <wes@wesbaker.com>

Conflicts:
	system/core/Security.php
Updating User Guide for 2.1.4.
Revert "Updating User Guide for 2.1.4."

This reverts commit c5f99fdcc5c4a918b5b8fe3ddbd56ab25ad1c22b.

Signed-off-by: Wes Baker <wes@wesbaker.com>
Fixing a typo in the user guide.
Correcting URL for search box.
Fix changelog errors
Fix download link for latest version
Fixing download links for old versions.
Merge remote-tracking branch 'origin/upstream-2.1-stable' into 2.1-stable