missing unit error is now fixed in bw2io 0.7.1
missing unit error is now fixed in bw2io 0.7.1

- pinning from e0800c27e6936e63d630488d305e868a0c4b003e not required
anymore
- bw2io 0.7.1 is required for version 3.5 of ecoinvent

pjamesjoyce/lcopt,pjamesjoyce/lcopt,pjamesjoyce/lcopt