Cross-platform filepaths

- Made the filepath to Hazeron's Mail folder so that it works for Linux
and so.
- Added a check to see if the program is able to find Hazeron's Mail
folder at all before trying to use it.
- Updated HMail.cs to the latest version.
-- The class "Helper" has been renamed to "HHelper".
Merge pull request #6 from Deantwo/master

Cross-platform filepaths