Fixes

HMail.cs:
- Merged HMail and HMailObj
- Fixed TimeZone pointing at the wrong byte
HObj.cs:
- Renamed HCityObj to HCity
- Renamed HShiplObj to HShip
- Renamed HOfficerObj to HOfficer
- HMailObj to HMail
- Deleted the unused HMake class
- Changed ID get to use the mail's SenderID rather than filename
- Fix for https://github.com/Deantwo/HazeronAdviser/issues/12
Main.cs
- HMailObj to HMail
- HCityObj to HCity
- HShiplObj to HShip
- HOfficerObj to HOfficer
- Hid ProgressBar2 from startup
- Added some debug code
- Moved abandonment indicator to the date column