Demo update notes for v0.42

[p]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:[/p]

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