Make script +x
remove superfluous git calls
Add an in-place Dep Diffstat to help readers of Changes understand if they need to read other files or not
Make sure stats are autoadded to NEXT
Add ChangeStats
Update AutoChanges
Finalise Changes/README
v2.004000

 [00 Minor]
 - change diff tool augmented to inject statistics into Changes where
   relevant
 - change diff tool auto injects references into Changes
 - change diff tool now +x

 [Dependencies::Stats]
 - Dependencies changed, see Changes.deps{,.all,.dev} for details
 - develop: ↑1