Added unprioritize support
Changed date time library for logging to LocalDateTime as well
When creating file, must include empty Tasks JSON template in storage.json
added tags for things to be supported but not in this version and added more skeleton code for vuew types
Merge branch 'master' into junhao-finish-unittesting
Added more skeleton code for dashboard view, tagged todos with version so that people know what version the method is expected to be supported by