Added support to Platform for detecting whether on a POSIX or Windows system, and text file line-ending string based on it.
Added support to Platform for detecting whether on a POSIX or Windows system, and text file line-ending string based on it.

krfkeith/slate-language,briantrice/slate-language,krfkeith/slate-language,briantrice/slate-language,krfkeith/slate-language,krfkeith/slate-language,briantrice/slate-language,briantrice/slate-language,briantrice/slate-language,krfkeith/slate-language,krfkeith/slate-language,briantrice/slate-language