Removed "routine interval" setting from FaxAlarmSource

Hard-coded it to be 2000 ms, which should be sufficient.
Removed choice of OCR Software

The team does only support tesseract, since it has proven to be the most accurate and reliable software. The previously public API has been removed.
Updated release notes
Refactored WindowsContracts
Refactored ProcessWrapper for stability

- Handle exceptions on starting gracefully
- Dispose of instance if required
Refactored MailAlarmSource

- More settings are now dynamic
- Removed "Poll interval" and hard-coded it to 10 seconds
- Improved error handling
- Better readability of the code
- Improved diagnostic statements
- Search all attachments for matches, not only the first one
- Corrected spelling errors
Hard-coded tesseract to be used