Merge pull request #265 from keithj/devel

Handle scans that have inconsistent data recorded in the LIMS
Merge pull request #267 from keithj/devel

Removed incorrect 'use' statement referring to a deleted package.
Merge pull request #268 from keithj/devel

Two further incorrect 'use' statements.
Added miget utiliuty script.

Added get_object and get_collection methods to iRODS.pm.