JIRAPLUGIN-26 v1.3
Removed radio buttons from End Time and Duration fields, select between
them by clicking into the appropriate field
The plugin now remembers which one of EndTime/Duration field was filled
in before an invalid submit.
changed jquery calls to version < 1.6 (.attr() instead of .prop())
Merge pull request #45 from daniel-zsigus/v1.x

JIRAPLUGIN-26 v1.3