0.1.3

Informer goroutine fatal logging (#28)

* Wraps the scheduler informer and other background goroutines with the fatal logging handler

* Refactors the SparkSchedulerExtender Start() and doStart() methods to be similar in pattern to the rest of the codebase

* Moves the checkDemandCRDExists call to run at least once before we launch the SparkSchedulerExtender doStart loop in its goroutine