Implemented enhancements:
- Choose entity types to work with (fixes #9) #18 (victor-homyakov)
- Make presentable ID in form "Bug#123", "US#123" #17 (victor-homyakov)
- Use offset and limit in queries #15 (victor-homyakov)
- Add pluginIcon.svg #14 (victor-homyakov)
Fixed bugs:
- Option "Include closed tasks" should work #8