Move eE() to Textpattern_Mail_Encode.

Introduces  Textpattern_Mail_Encode::entityObfuscateAddress(),
deprecates eE() and turns it into a wrapper.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5621 2fea6a4d-a838-0410-917b-93a53c48e9d2
Factorize this call.

git-svn-id: http://textpattern.googlecode.com/svn/development/4.x@5622 2fea6a4d-a838-0410-917b-93a53c48e9d2