Feature: uniform HWP ammunition

Ammunition can be used for HWP and for Craft weapons.
Not breaks current saves.

Reasons:

1. The Coelacanth/Gauss uses Craft Gauss Cannon rounds, which must be manufactured and are shared with any Gauss Cannons in use at the base. http://www.ufopaedia.org/index.php?title=Coelacanth/Gauss

2. I can use Elerium for Plasma canon AND Plasma hovertank :)

````
craftWeapons:
  - type: STR_PLASMA_BEAM_UC
    ammoMax: 50
    rearmRate: 10
    clip: STR_ELERIUM_115
items:
  - type: STR_HOVERTANK_PLASMA
    compatibleAmmo:
      - STR_ELERIUM_115
    clipSize: 30
  - type: STR_ELERIUM_115
    clipSize: 5
    battleType: 2
    hitSound: 19
    hitAnimation: 46
    power: 110
    damageType: 5
````