Balance changes and performance improvements

Made many balance changes and several performance improvements, which should especially help for running on Firefox.

Balance changes include:

• Restaurants nerfed to $0.50/s for each house
• Convenience store cash and click rate increased
• Warehouse cash rate decreased, click rate increased
• Fountain cash and click rate increased, buffed to $1/s for each grass
• Bank cash rate decreased, buffed to $0.50/s for each house
• Apartment cash rate decreased
• Mall click rate increased
• Courthouse range increased, cash rate increased
• Hermit nerfed to -$3/s for each building
• Office nerfed to $3/s for each warehouse