Telliot-core

What's Changed
* Add tellor contract directory and doc updates by clamdad in https://github.com/tellor-io/telliot-core/pull/144
* New listener w/ simple raw message handlers by clamdad in https://github.com/tellor-io/telliot-core/pull/145


**Full Changelog**: https://github.com/tellor-io/telliot-core/compare/v0.0.2...v0.0.3

What's Changed

* Documentation updates and remove unused code. by clamdad in https://github.com/tellor-io/telliot-core/pull/142

**Full Changelog**: https://github.com/tellor-io/telliot-core/compare/v0.0.1...v0.0.2

This is the initial release of the Telliot core package.