Make loading the JSON specification file give a better error message, including the specification filename.
4.0.13
Added missing `<` in command line providing input from `*.bz2` files to the command being executed by `sbatch.py`.
4.0.12
Added `--verbose` option to `sbatch.py`.
4.0.11
Added `--compressLevel` and `--randomSleep` options to `sbatch.py`.
4.0.10
Added compression of input files to `sbatch.py` and an `--uncompress` option to turn this off. Thanks to [holtgrewe](https://github.com/holtgrewe) for this suggestion.
4.0.9
Updated `.travis.yml` and build status image URL on `README.md`.