massive admin page refactor.  explicitely set protocol.  TABS.  do not check for mail until user has configured settings.

git-svn-id: http://gsoc.svn.wordpress.org/2013/codebykat/post-by-email/trunk@2270 f69abe3c-2ee2-4550-9a6d-17bd458115be
admin notices/errors, better logging

git-svn-id: http://gsoc.svn.wordpress.org/2013/codebykat/post-by-email/trunk@2271 f69abe3c-2ee2-4550-9a6d-17bd458115be