Raise errors on failures in loading data

[jonrkarr]

hsload currently prints console messages when data loading fails (e.g., request entity too large):

h5pyd/h5pyd/_apps/utillib.py

Line 532 in aa60cf5

except (IOError, TypeError) as e:

To make errors easier to detect, it would be helpful for hsload to exit with a non-zero exit code such as by calling sys.exit(1) after L532 above.

[jreadey]

See commit: 994cffc.
new behavior is for hsload to fail on an error unless the --ignore flag is used.
This is in the aggregate branch - will close issue once merged with master.

[jreadey]

Fix is in master.

[jreadey]

Closing - fix is in the 0.12.0 release on PyPI.