IdBag

IdBag is used at run time in 3 crates.

Number of dependers	IdBag version	Downloads/month
2	0.2.2	0
1	0.1.2	0
0	0.1.0	0

Depender (with downloads and own rev deps)			IdBag version
350		lstngrp		^0.2.1
210		fsblobstore		^0.2.0
		lstnconn		^0.1.2