NullTransport should report that all emails have been delivered.
bug #385 NullTransport should report that all emails have been delivered. (michaldudek)

This PR was merged into the 5.2-dev branch.

Discussion
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NullTransport should report that all emails have been delivered.

The PHPDoc for ```NullTransport``` says:

> Pretends messages have been sent, but just ignores them.

However it returns ```0``` from ```send()``` method saying that no mail has been delivered.

It should return number of recipients.

Commits
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157ca16 NullTransport should report that all emails have been delivered.