event configure command

[lleadbet]

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Problem/Feature

Adds a new twitch event configure command as noted by @BarryCarlyon in #96.

Description of Changes:

• Adds new command
• Updated test harness to add a new temporary environment variable to allow for easier overriding of the viper configuration path

Checklist

• My code follows the Contribution Guide
• I have self-reviewed the changes being requested
• I have made comments on pieces of code that may be difficult to understand for other editors
• I have updated the documentation (if applicable)

[Xemdo]

Changes have been made to cmd/events.go after you submitted this PR.
Can you check over the conflicts to see how it should be resolved?

[lleadbet]

@Xemdo - done