Imap4flags: now reads initial flags and keywords from supplied mail. Upon delivery this is empty, which still matches the specification.

Testsuite: added support for testing delivered messages by looping these back as the evaluated message. Added tests for the fileinto command.

Testsuite: added tests on the envelope of outgoing messages produced by redirect, enotify:mailto, reject and vacation.

Testsuite: added tests for envelope/address test behavior with non-existant subaddress :detail part.

Improved error message for unknown Sieve extension to account for core commands included as an extension.

Include: replaced import/export commands with global command as specified in latest draft. Import/export are now DEPRICATED.

Imap4flags: added support for obsolete imapflags extension for backwards compatibility with CMUSieve.