Productions Pack v1.2.0.0

Production package.
Included are a pig feed production, a mixed ration production and a silage production.

Changelog 1.2.0.0:
-Clear and level area changed
-Added symbols to the signs
-New store icons-
-Other changes

Characteristics:

Name: pig feed production
Price: 20000$
Maintenance: 20$/day

Name: Mixed Ration Production
Price: 20000$
Maintenance: 20$/day

Name: silage production
Price: 20000$
Maintenance: 20$/day

Changelog 1.1.0.0:
-Increased DescVersion to 64
-Mixing ratio adjusted