* Rename commands
* Rename all AddressBook related classes and methods into Carvicim
* Remove unused method and class
* Fix checkstyle error
* Update delete employee feature to prevent deletion of employee that is assigned to a job
* Remove edit employee feature
* Update checkstyle error
* Add remark adding feature
* Fix checkstyle error
* Add test cases for delete employee feature
* Remove unused classes
* Add tests for XmlAdaptedJob
* Add missing method header in XmlAdaptedJobTest
* Remove test
* Fix sessionData nullpointer
* Fix CommandWords toString ordering problem
* Add missing imports
* Update methods name for DeleteEmployeeCommandTest
* Add back test for DeleteEmployeeCommandSystemTest
* Add new tests for RemarkCommand
* Add more tests for XmlAdaptedJob
* Update Clear command
* Add test for ListJobCommand
* Add tests for RemarkCommandParser
* Reaname SelectCommand to SelectEmployeeCommand
* Fix checkstyle error
* Add more tests for CarvicimParser
* Add close job feature
* UserGuide.adoc: update features