removed dead & unused code, typos
UserPanel: removed $this from template
ContainerPanel: removed $this from template
RoutingPanel: removed $this from templates
Mail\MimePart::encodeHeader() fixed counting of offset
Mail\MimePart::encodeHeader() - do not use base64 encoding for long headers [Closes nette/mail#4] partially
Mail\MimePart::getEncodedHeader() don't use base64 encoding where can be quoted string [Closes nette/mail#4]
Finder::filter() - callback always receives as argument (at least) a FilesystemIterator

Conflicts:
	Nette/Loaders/RobotLoader.php
	Nette/Utils/Finder.php
make CI build faster