drslump/Protobuf-PHP — pull request #32 by jgiacobbi (2013-12-16 16:00:14+00:00)
Title: Added isMessage to make parsing nested message structures cleaner

Other types are less important, this being PHP and all, but knowing if the content of a field is a Message is valuable for parsing nested message structures.

Obviously this isn't necessary, but it turns
```php
$field->getType() === \DrSlump\Protobuf::TYPE_MESSAGE
```
into
```php
$field->isMessage()
```
which is nice