Discarding use of ZENITY under linux (previously used with the tinyfiledialog) because snapcraft makes it impossible to use :(. Reimplementation of GTK+ dialogs directly inside vimix code. Note: no changes for OSX. Complete cleanup of cmake file.
checks for the presence of vimix programs in the network neibourhood.
The list of connections can then be used for indentifying streaming
requests and offers.
