Add icons to more of the servers.

These are not perfect, but better than using the default app icon. Feel
free to improve.

- DNS resolver: phonebook icon
- App-server: hand + app icon
- Keystore: k

Add icons to more of the servers.

These are not perfect, but better than using the default app icon. Feel
free to improve.

- DNS resolver: phonebook icon
- App-server: hand + app icon
- Keystore: key lock
- Launch daemon: croissant (to get the day started)
- Net server: hand + earth
- Package daemon: hand + package
- Power daemon: CF lightbulb

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