Unity security update

Updated the levels of the Ruby pack, where you were not able to exclude the fog.

Added a possibility to play absolutely free - added ads as rewards.
Optimization and bugfix
Added a possibility for additional trains in Passenger Flow
Improved performance

Now you don't need to upload an additional pack of data - start your play once installed.
Optimization: now the game performs better and much faster.
Levels improvements.
New prices for all the packs.

bug fixed

-new in-app purchase added
-bug fixed