Release - v2.0.0

Fairly large release

• Added historical trending using the -t switch. This will query IEXCloud for three months of historical data and display in a vertical map
• Switched to gson from SimpleJSON
• Changed version format from using a simple date to a more traditional format. This is v2.0.0

Please note that this historical quotes does use quite a few IEXCloud Calls and will be much more expensive than a simple quote. I don't think it's very impactful, but something to keep an eye on in the dashboard.