Refactored clipboard change handling to more reliable way (owner instead of flavors)
Whitespace fix
File processing functionality - upload single file in original format or multiple files in one zip archive

There is 4 situations, which can occur:
- single file, no upload - only absolute path to file is copied to clipboard
- single file, upload - file is uploaded to FTP server and named after its SHA hash, URL copied to clipboard
- multiple files, no upload - files are compressed into single archive named by actual date and located in running directory, absolute path copied to clipboard
- multiple files, upload - files are compressed into single archive and then uploaded to FTP server, file named by its SHA hash, URL copied to clipboard
Build: Version 3