Organized city and advisor dialogs

- Added another existing character, Cindy Diamond, to take over as City Planning now that City Limits officially takes place in Nethington. Zack now handles transport.
- News keys are now properly shuffled after index.
- Updated screenshot to the recent look
- Simplified money cheat
- Updated credits in README

dialog/advisors/cityplanner.json

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+{
+    "1": {
+        "name": "Roll up your sleeves, Mayor!",
+        "text": "Welcome to City Limits! I'm Cindy, and I'll be your city planner. I'll help you with zoning, land values, and handling connections to and from the city."
+    }
+}

dialog/advisors/finacial.json

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+{
+    "1": {
+        "name": "Let's get number crunching.",
+        "text": "Hello, Mayor, I'm Kit Welsh. I'll be your financial advisor. I control the income and expenditures for your city. I'll keep you up-to-date on expenditures and let you know if we may need to lower or rise taxes."
+    }
+}