Syncing submodules with upstream
Reorganization of headers to prevent the need for exporting libuv
definitions to programs that embed Julia.
Femto Lisp include changes required discovered by rebuild.
changed comment of ios_buffmode to a deletion
Moved decl of jl_spawn inside of extern "C" {}
Merge branch 'waT/uvsplit' of github.com:waTeim/julia into waT/uvsplit