New Subrace Features for the Rohirrim

Today, we introduce several features for Rohir players.

* Rohirrim who possess enough skill in Riding will never be thrown off by their
  mounts.

* Rohirrim share a special bond with their mounts and will find them to be
  less stubborn.

* Rohirrim are particularly skilled with spears while riding.

* Rohirrim start the game with a bonus in the Riding skill. This bonus does not
  make practicing less effective.

Coding: Jahara
Testing: Pilois, Aloonion, Imago