mimemail 6.x-1.0-alpha5

The fifth unofficial release and snapshot of current functionality.

The following patches have been committed since the alpha4 release:

• #850674 by sgabe, AlexisWilke: Prepare function name testing '_prepare'...
• #448996 by mfb, hanoii, Sylvain Lecoy: Wrong implementation of hook_mail_alter()
• #319229 by sgabe, jm.federico, joostvdl, donquixote, fehin, sunfire-design, mariuss: src='Array' if path to image is broken
• #517306 by sgabe, rdosser: Mime Mail Compress mangles absolute URLs in CSS properties
• #597448 by sgabe, rmjiv: Unsafe regex pattern in mimemail_extract_files()
• #535466 by andreiashu, sgabe: WSOD when using Mime Mail Compress without DOM extension
• #513138 by sgabe, peterx: Undefined variables in mimemail.inc
• #304476 by sgabe, Thomas_Zahreddin, aaron: PHP Error when Stylesheets don't exist
• #710116 by sgabe, neoglez: Wrong implementation/namespace conflict of mimemail_prepare()