Do not limit data object timestamp searches to replicate 0.

Improved debug logging of query building.

Removed an unnecessary use of 'tr' in the Travis config.
Merge pull request #99 from keithj/devel

Do not limit data object timestamp searches to replicate 0.
Report timestamps for all replicates.
Fixed possibly uninitialised variable.
Added tests for mapping iRODS paths to local paths and parsing replicate
numbers.
Merge pull request #100 from keithj/replicates

Report timestamps for all replicates