Add plugin meta information

Adds plugin meta data and plugin version to prevent v0.0 upgrade issue:
![version-bug](https://cloud.githubusercontent.com/assets/1214387/4672133/1c4a1f3c-558a-11e4-9358-52456d739ff3.png)
![version-fix](https://cloud.githubusercontent.com/assets/1214387/4672145/6606c88c-558a-11e4-97bf-6a97b28ae57b.png)