Server Icon and VoxelSniper plugin

**Content**
This pull request adds the VoxelSniper 5.169.0 plugin, adds a server icon and styles the MoTD a little.

**Proof of Testing**
![screenshot](http://i.imgur.com/UfuDeMv.png)

[VoxelSniper](http://ci.thevoxelbox.com/job/VoxelSniper/309/) md5:
```
ddc6017285eb3c543400acbdf61ccc2c
```