Development Update #02

A.1.0.5.5438

Game patch
- Buildings added (Bush plantation, Tree plantation, Quarrying machine, Mining machine, Oil pumping machine)
- Researches added (Mechanic, Veteran Mechanic, Master Mechanic)
- Items added (Maintenance Kit, Battery, Motor, Engine)

Bugfix
- We fixed the bug where the door opens when the zombie is nearby.
- We fixed the bug where the demolition interaction was not properly canceled.
- We fixed the bug that does not show the flame thrower effect.
- We fixed the build UI related bug.
- We fixed a bug in the bird house that doesn't make a bird's egg properly.