some fixes to Kow 2.0 army lists

Today the Kings of War book arrived at my home, there are few issues in the online pdf that have been fixed in the book, so I'm changing the following stats both on eKow online and the Android version:

• Artillery Master has a Ra of 4+ instead of none
• Orcs Ax doesn't have a Ra value at all
  
• Undead Wraiths Half Regiment and Regiment have a Me of 4+

the updated version of eKow online is available now while the Android version will be released during this week