Unable to find the file with racer daemon on Windows

[wontoncc]

It seems racer daemon can not take quoted filename as an argument. When I drop the quote, racer can successfully find the file and give out matches.
But another problem arises, that a filename containing spaces can't be found. Having tried to double quoted the filename or escape the spaces with \, but no luck, It can be an issue on the racer side.

I opened up a pull request #64 to partially fix this.