Demo update notes for v0.42

Truck City v0.42-Demo has just been released. This is a small patch with bugfixes only, with the objective of improving demo stability before Steam Next Fest, This is the change log:

• Bugfix: corrected glitch where placing one way roads next to factories may build an incorrect tile
• Bugfix: corrected tile preview for one way and two way roads, where an incorrect tile may be shows in the preview
• Bugfix: minor correction in intersection functionality, solves corner cases
• Bugfix: a duplicate blueprint may be added to the library in some cases, solved.
• Minor corrections in research descriptions