Diagnostics\Dumper: added support for SplFileInfo [Closes #984]
Mail: Renamed MimePart::generateMessage() to MimePart::getEncodedMessage() (BC break)
Mail: Deprecated Message::send(), use IMailer::send() instead (BC break)
Merge pull request #985 from enumag/mailer-2

Mail: Deprecated Message::send(), use IMailer::send() instead
synchronized with changes in main Nette repo