allow customization of a few variables
Merge branch 'develop'
Bump version 2.5 -> 2.6
Merge branch 'develop' of https://github.com/nosami/omnisharp-emacs into nosami-develop
Merge branch 'master' into develop
Merge branch 'nosami-develop' into develop
Don't allow helpful customization on a company-mode type separator value

I think this is more of an internal value that shouldn't be changed by
the user.