Clean up after 2013.3-921-g9de115c (9de115c)

In particular, stop farm overview from crashing.
Fix farm overview tab layout

It can now hold up to 6 different lines again, everything beyond will
still be broken. Suggesting a scrollable area instead of further down-
sizing there though.

Multiple in- or output resources per line are also still a bit broken,
because the cogs icon doesn't cover 100% of the background arrows.
For details, click on any pastry shop.
Add dummy object files for new fields

COFFEE_FIELD COTTON_FIELD FLOWER_MEADOWS INDIGO_FIELD TEA_PLANTATION
Add some object files for planned tier 6 buildings

PERFUMERY LIGHTHOUSE
Add some object files for planned tier 5 (Merchants) buildings

CATHEDRAL GOLDSMITH ROASTERY TAILOR TEA_GARDEN WHALE_PROCESSING UNIVERSITY
Add some object files for planned tier 4 (Citizens) buildings

SALINE PUBLIC_BATH
Add bridge object file placeholder (tier 1)
Add store object file placeholder (tier 2)
Add collector to pastry shop

No idea what was happening here. Probably not much.
Add jewelry dummy resource, remove silver line

And reorder everything.
For now, "remove" faith2 and education2 as well, not sure how those will
work yet - provide both levels?
Add some production lines and storages to dummy buildings
Cannon foundry dummy

Voted to drop the complex bronze (tin + copper + ...) lines now. Iron.
Might want to combine this with weaponsmith, as they are similar.
Fix cannon foundry building id

This might actually exist soon, yay!
Convince resource overview bar to not crash (for now)
Fix some tier categories in new dummy building constants
Add dummy buildings to per-tier build menu (as comments)

The headlines can go live already, nobody is going to see any of this in
real games anyways due to TIER.CURRENT_MAX.
Add cannon foundry build menu icons, enable in per-tier build menu
Unleash content to the world

TODO finish per_type build menu, remove build menu hack, remove 2x2 hack
[Hack] Don't crash build preview on building higher-tier buildings

Please revert this when building material is agreed upon properly.
Try to fix pastry shop production

Mostly to better fit into the GUI, sugar from honey is not great...