If someone does not supply the ```channels``` param to the eon.map object a very confusing error is thrown. Catch this and throw our own error. <img width="1428" alt="screen shot 2017-07-07 at 11 20 25 am" src="https://user-images.githubusercontent.com/318295/27973689-8f3bf2e4-6320-11e7-98c8-e4290cb83036.png">
If someone does not supply the
channelsparam to the eon.map object a very confusing error is thrown.Catch this and throw our own error.