update and new plugin

Hi,
I updated LCD and pressure plugin and add new plugin system info...
![lcd plugin](https://cloud.githubusercontent.com/assets/7847139/5042036/91c84a9a-6bce-11e4-9ba4-c9d65cd5d076.png)
![pressure plugin](https://cloud.githubusercontent.com/assets/7847139/5042038/91d0e15a-6bce-11e4-95cc-3f4a41c5742c.png)
![system info plugin](https://cloud.githubusercontent.com/assets/7847139/5042037/91cb997a-6bce-11e4-8761-7e98599c3d7a.png)

Thanks Martin