Added collection factor to AntimatterCollector

Hey WaveFunction,

thanks for updating KSPI. It's one of my core mods for KSP.
I added an additional parameter to the AntimatterCollector to allow bigger collectors.
I hope you can test and include it in your branch. Also I hope that I didn't break something since I do not yet fully understand the KSP API.

To make a bigger antimatter collector, you can create a new part, that has multiple MODULE elements.
Unfortunately the game will freeze, when you try to add thousands of MODULE elements.
The game will also be unplayable when you try to build a craft with thousands of AntimatterCollectors.
Therefore I suggest adding a collection factor to the MODULE which would look like this in the part.cfg:
MODULE
{
name = AntimatterCollector
collectionFactor = 10
}
So I suggest a factor of 10 for doubling the diameter of the collector while it's volume increases 8 times.
Now, one could create an entire collector family:
Diameter mg/d        mg/s                     Weight
2.5             4           0.0000462963          4
5              40           0.000462963         12
10            400         0.004629630         36
20           4000        0.046296296        108
40          40000       0.462962963        324
80         400000      4.62962963         972
160       4000000    46.2962963        2916

The weight increases three times, since two times seems too weak and four times to strong.
With the last collector you could power four large 3.75m upgraded antimatter reactors at full power, but would also need to bring at least 3200 tons to 900 km orbit.
If people want to cheat, they can simply add antimatter to their save file.

Cheers
Ingo