a better format for completion
a better format for completion

This will allow neosnippet's enable_completed_snippet function to work
correctly. I also removed reading g:tern_show_signature_in_pum because
it didn't make much sense to use the opposite default of tern-for-vim.
We might as well not listen to it at all. I can't see much reason for
disabling the function signature anyway, but if we do, we should use our
own option since we want it enabled by default.

carlitux/deoplete-ternjs,carlitux/deoplete-ternjs