added basic ocaml(merlin) support

autoload/SpaceVim/layers/lang/ocaml.vim

@@ -0,0 +1,18 @@
+" OCaml autocompletion provided by merlin
+" https://github.com/ocaml/merlin/tree/master/vim/merlin
+"
+" Make sure `opam` and `merlin` are installed on your system.
+
+function! SpaceVim#layers#lang#ocaml#plugins() abort
+    let plugins = []
+    let g:opamshare = substitute(system('opam config var share'),'\n$','','''')
+    call add(plugins, [g:opamshare . "/merlin/vim", {'on_ft' : 'ocaml'}])
+    return plugins
+endfunction
+
+function! SpaceVim#layers#lang#ocaml#config() abort
+    let g:syntastic_ocaml_checkers = ['merlin']
+    augroup SpaceVim_Ocaml
+        autocmd FileType ocaml execute "helptags " . g:opamshare . "/merlin/vim/doc"
+    augroup END
+endfunction