4bfdf04d59 moved all clink config files
to vendor/ and therefore the files in config/ were not used and .history
was also moved to vendor/.
The new arrangement uses `--script` to load our own clink.lua file which in
turn as the first thing loads the original clink.lua file. The user defined
files are again in config/. As clink regenerates these files, if they are not
present, this also means that we don't need to include the settings file
in the git repo and therefore don't overwrite it on updates.
