Merge pull request #1 from ChristianDevs/HEAD

Adding shards and orbs currencies
Merge pull request #2 from ChristianDevs/HEAD

Added unit upgrade feature
fixed timer bug

Added a bug fix to replaying levels
Merge pull request #3 from codergreen/master

fixed timer bug
Fixed upgrade bugs
Fixed drag-and-drop null reference error
Fixed getStats null reference bug
Merge pull request #5 from brandav/dev

Unit upgrade and bug fixes test