Fixes a minor warning regarding shadowing of local variable
Adds unit test showing an issue with dates remaining flagged as changed after save
Adds a patch to check changes in dates with a given accuracy
Adds more tests for date change saving
Merge pull request #47 from iosphere/pullrequest/minorShadowWarning

Fixes a minor warning regarding shadowing of local variable
Merge pull request #49 from iosphere/pullrequest/dateSaving

Pullrequest/date saving