Issues in recent commit

[nk027]

I spotted some issues in the most recent commit:

• build_cbs#308 now includes item code 2001 (grazing), which is not an actual item, but rather estimated later on. Adding it here is misleading.
• tidy_functions#area_kick() is now broken - the group argument no longer kicks groups, but also some countries in an intransparent way. Countries should be kicked separately by providing their area_code and optionally name in the style of China.
• tidy_fao#Livestocks now breaks the script's logic - live_trade should either be tidied separately, or fully in joint with the rest of live. Item codes should be remapped via concordance tables and not within scripts (live_trad[Item Code%in% c(1057,1068,1079,1083) ,Item Code := 2029])