share/IlluminaData.py: version 1.1.1

Update get_casava_sample_sheet function to handle "Experimental Manager"-type
sample sheet files when there are no barcode indexes.
share/JobRunner.py: version 1.0.1

Fix and standardise handling of log and error files for SimpleJobRunner and
GEJobRunner classes; also added minimal unit tests for these classes.
Updated ChangeLog.