Improvement: credits are now localized

Improvement: cement container color changed to make it easier to distinguish

Improvement: minor performance improvement on texture caches generation

Bugfix: corrected a bug in the texture cache for containers

Bugfix: corrected minor glitch where some windows had the wrong z-index

Bugfix: corrected minor glitch where blueprints would not show smoke when built on tiles with one way roads

Bugfix: corrected a minor check that was unnecessarily logging errors on first-run execution