Feature: Graphs

[mathew-tran]

Start tracking on a day to day basis:

• Population
• Material Gained
• Material Spent
• Buildings removed
• Buildings Added

Then have the ability to see graphs based on the above properties in different time ranges.
past 7 days, past 30 days, past year, past 5 years.

Needs some additional considerations on how to save this data. May need to condense it over time. As it could bloat the save file size
i.e.
if the day data is older than 30, convert it into month data