RLS on Windows

[Et7f3]

This PR fix 2 bugs on windows and it is related to #199
It is enough for me to have https://atom.io/packages/ide-reason working on my computer

[Et7f3]

I haven't fixed OCAMLLIB variable bug (I have set a global one as workaround) this is resolve in #199
and I don't understand why util/Commands.re change in #199 (maybe a nother bug I haven't seen) and didn't touch to test (maybe add one or fix them if they are present)

[Et7f3]

Where is absify used ? Maybe there is other pieces of useless code.

[zetashift]

@Et7f3 you mean you set a global PATH variable as a workaround for the OCAMLLIB error?

[jaredly]

Could you do a test to see if the user is under cygwin?

[Et7f3]

@zetashift No You can set env variable and I have done this

if you are on Windows: I open Windos menu type env

Should be change environnement variable or something else in english

then you can add key/pair value and set manually OCAMLLIB

[jaredly]

thanks!