2019-Jul-31: Version 0.5.0

• LoTW download: Show list of confirmed contacts after import.
• Usability: Flush keyboard input buffer frequently during blocking operations (e.g. scrolling) to avoid unexpected behaviour (such as further scrolling after PgUp/Dwn was released)
• Include a minimal DX cluster / bandmap tool.
• Support for terminal window sizes beyond 80x25. Additional vertical size allows to show more QSOs in the log, horizontal size will be used for the bandmap / DX cluster (if configured)
• Include docs in the release tarball and install it to share/doc/yfklog
• Remove GNUisms from Makefile (tnx KC3NTG)