Power types

[dfighter1985]

Since some ( all? ) vehicle power types seem to be missing from the DBC files, it's high time we implemented DB based power type settings.
So need to add new fields to creature_proto that will contain the power type and max power value of creatures.

[Lokenn]

Yeap some missing, not all.

[Eatos]

D want me to implement it?

[dfighter1985]

@Eatos go ahead if you want to give it a try.

[Eatos]

D problem is i have done it but don't have clue how to create patch with that git thing.