Set and use 'path' and 'suffixesadd'

[tpope]

I was in the process of preparing to release my own (much smaller) Lua filetype plugin when I stumbled onto this project. I'd be thrilled to use someone else's project instead of maintaining my own, but as it stands, I would need a few changes. Specifically, I need the standard 'path' and 'suffixesadd' to be used, both because I depend on them (for things that don't go through 'includeexpr') and because I need to change them (e.g., to append configuration directories for awesome). Would you be open to retooling to support this workflow?

Here's the corresponding logic from my own filetype plugin, so you can see where I'm coming from.

[wsdjeg]

@tpope thanks for your work. @xolox does this project provide a source for neocomplete or deoplete?