Campaign Map from a small part

[Monkwarrior]

I've been working in this guide about how to cut a small part of the original campaign map and to create a new campaign from it. I hope it will be useful.

Sections:
- General remarks
- Cutting the maps (1)
- Cutting the maps (2)
- Enlarging the maps
- Text files
- Modification of descr_strat

Myrdraal: please, correct all the mistakes you found in this guide. Thx