Fixes in error handling, split off validation
tree23df2746c7ce7109129e9a4200d84124d957b8f5
-rwxr-xr-x 1060 ppg
-rwxr-xr-x 2279 ppg-commit
-rwxr-xr-x 539 ppg-initdevenv
-rwxr-xr-x 1428 ppg-validate-staged-files