Added Game statistics

Changes
• NEW FEATURE: Game Statistics
• Stacking research now shows current bonus
• Whim House research shows hint to unlock water buffalos
• Reverted last shipyard interface change as it lead to confusion

Bugfixes
• Fixed purple textures on low end devices
• Deposit highlighting ignored fog
• Custodian checkbox was grey when selected
• Quick selection now allows buildings not being able to build to be selected
• Infinite tax bonus and build cost reduction was twice as effective as intended