initial import of hatire by Furax49

Signed-off-by: Stanislaw Halik <sthalik@misaki.pl>
install hatire

Signed-off-by: Stanislaw Halik <sthalik@misaki.pl>
make hatire actually buildable

Remove 'captain obvious' comments, references to <windows.h>, fix
spelling errors, use UI layouts, and so on

Signed-off-by: Stanislaw Halik <sthalik@misaki.pl>
Link against qt5serialport properly
cmake cleanup
convert icon to .png, doesn't work on win32 ironically
do NOT use linker scripts on win32, breaks with stdcall prefix!