Bump dev version to 0.5
Bump dev version to 0.5

SamPenrose/fhr-toolbox,SamPenrose/fhr-toolbox,SamPenrose/fhr-toolbox,SamPenrose/fhr-toolbox,mozilla-metrics/fhr-toolbox,mozilla-metrics/fhr-toolbox,mozilla-metrics/fhr-toolbox,SamPenrose/fhr-toolbox,mozilla-metrics/fhr-toolbox,mozilla-metrics/fhr-toolbox