Writing error logs to an ILogger instead of Console, adding an event for Unsupported Events

[DrEsteban]

This contains fixes for the issues described in:

• [ISSUE] Writing error messages directly to Console is bad form #136
• [ISSUE] Give users the opportunity to handle "Unsupported events" rather than just throwing them away #138

It also contains:

• Build enhancements

[BarRaider]

Multiple small pull requests is probably better than one big one

[DrEsteban]

You're not wrong haha. But some of the concerns may cause merge conflicts with each other - e.g. the ILogger and UnsupportedEvent, since they touch lines right next to each other.

Would you like me to split it up as follows?:

1. ILogger + UnsupportedEvent changes
2. Other Model changes/fixes

[chapterjason]

Hey @DrEsteban are you still working on this; or do you need someone else to take over?

[DrEsteban]

@BarRaider @chapterjason Finally got around to splitting this up. Second PR is #143.

Feel free to submit fixes or change requests as desired.