Added a branch alias instead of dev-master

Added a branch alias instead of dev-master, for better handling of dev/stable packages with Composer. I've used 1.0.x, but this can be anything adapting to your thoughts of versioning YaLinqo. 

Read more about it here:
https://igor.io/2013/01/07/composer-versioning.html
and here:
http://getcomposer.org/doc/articles/aliases.md

This would be a good addition to an already great library :)