British and South African updates

To reduce the number of blog entries for minor updates, I'll start to combine them when I can. Here's some minor updates for the following:

• South Africa: Marmon-Herrington

• United Kingdom: Crusader Mk I, Valentine Mk II, Universal Carrier, Cruiser Mk II

Britain's Bren Gun Carrier updated

I've made some updates to the British Bren Carrier.

Britain's Loyd Carrier updated

I've added specifications and additional design information for the Loyd Carrier.