rhbz873489 Extract sourceHash calculation from PoReader2 to HashUtil.sourceHash
rhbz873489 Add sourceHash for Properties files
rhbz873489 Add sourceHash to TextFlowTarget in XliffReader
Configure Travis to run Maven in batch mode
Refactoring based on review comments
Upgrade zanata-parent; remove unused dependency
Merge pull request #1 from zanata/rhbz873489

rhbz873489 XLIFF/Properties strategies should calculate and set sourceHash for safety