A smarter ShipMarket in SpaceStation

Spawn ShipMarket in equilibrium, and allow different equilibria for different
stations.
Merge pull request #3243 from impaktor/individual_shipmarket_sizes

A smarter ShipMarket in SpaceStation
Update Changelog.txt
Disable render to texture again, don't think I'll enable this again until we have PostProcessing.
Merge pull request #3246 from fluffyfreak/fix3239

Fix Anti-Aliasing
Update Changelog.txt
auto-commit: translation updates
The OSX build showed these might be shadowed, renamed to avoid it.
Merge pull request #3248 from fluffyfreak/colour_shadowing

The OSX build showed these might be shadowed.
Update Changelog.txt