Add additional descriptions of the device

[moritzstaffel]

Implements #45

[moritzstaffel]

Summery of discussion:
The distance need more definition, as it is not clear what they actually do and how do we define this.
Laser, CO2 Cannon, Pyro: Do they need this as well.

[moritzstaffel]

We don't do the DistanceToFlammable

[moritzstaffel]

DistanceToTarget

Minimal distance to the target of the device. For Lasers, WaterFountains, Audio and Lighting devices.

[petrvanekrobe]

• Robe defined data: Min. distance from flammable materials: 1 m is a required information about distance from flammable materials based on surface temperature of the fixture's housing. This is defined in EN IEC 60598-2-17 part 2-17, section 17.6.4 - minimal distance from flammable materials of all outer surfaces of the device.

• Robe defined data: Min. distance of illuminated objects: 18 m is a required information about distance on which the fixture could make illuminated surface warmer then 90°. This is defined in EN IEC 60598-1, part 1, section 3.2.13. Often accommodated by this picture: