cf: when "no matching files found" include retrieved filenames in err…

…or (#557)

cf: include more detail with "No matching files found for mod" error (#…

…555)

mcopy: check for unsupported HEAD before failing request (#551)

fabric: accept shared fetch/netty arguments (#545)

fabric: retry loader version lookup (#543)

sync: correct previous code to work with Java 8 (#540)

sync: skip missing source directories (#539)

sync: allow multiple source directories (#536)

Pr/liven/fix placeholder subtitution (#531)

toml-path: match usage of yaml-path (#527)