added mailman wrapper for creating/deleting lists
added simple message browsing functionality
added mailing_message model and Mailer.receive method
added mailing_list model and controller
added mailing_lists branch
added back database adapter name on admin/info
fixed: error when clicking "add" with no block selected on my/page_layout
tagged version 0.4.2
updated CHANGELOG for 0.4.2 release
fixed: crash on my/page_layout (trying to modify a frozen hash)
