Pexeso, Silhouette, Similarity minigame changes

1) Removed excessing tiles in Resource pack menu.
2) Music and sound fixed.
3) Pictures load method changed.
4) Pexeso, Silhouette and similarity merged to one minigame. You can set the minigame by altering currentGame attribute in ResroucePack script in start method (changing the value in attribute definition or Unity inspector has no effect, Unity always reverts in to Pexeso).
5) Some debug logs added.
Merge branch 'develop' of https://github.com/BrainProject/UnityTemp into develop
Merge branch 'develop' of https://github.com/BrainProject/UnityTemp into develop
New version of Pexeso/Silhouette/Similarity game
- All pictures are now png
- GameTile prefab was broken when I pulled newest version, tried to fix that
- Loading external files on Windows platform - needs testing (if you launch game in Unity editor,you will have all resource packs available twice, as they are both built-in and will be found by my newly written method)
- New resource packs. Currently, there are 4 for Pexeso, 3 for Silhouette and 2 for Similarity
- New method for menu rows and columns calculation, there is no need to specify them manually now
improve custom image-sets loading and rendering.
remove old assets.
Add new gesture (raise right hand and hold it for at least one second).
Merge branch 'develop' into Pexeso
Merge branch 'Pexeso' of https://github.com/BrainProject/UnityTemp into Pexeso
Merge branch 'develop' of https://github.com/BrainProject/UnityTemp into develop
Merge branch 'Pexeso' into develop