[TW CodeJam] Refactor MergeConceptsControllerTest and MergeConceptsServiceImpl.
Merge branch 'master' of https://github.com/openmrs/openmrs-module-mergeconcepts
[TW CodeJam] Uncomment test on newDrugs in MergeConceptsManageControllerTest.
[Steve] Refactor MergeConceptsServiceImpl and MergeConceptsManageControllerTest.
[Steve] Refactor MergeConceptsServiceImpl, MergeConceptsService, HibernateMergeConceptsDAO, and PreviewErrorValidator
[Steve] Add space at bottom of preview and results page so links aren't hidden by footer.
Merge pull request #22 from spwntr/master

ThoughtWorks Chicago CodeJam and Friday afternoon refactoring with a bug fix.