Do not include \n in utils_line

This is just wrong, it shouldn't be needed (and it appears ugly in the
chef output log).
Merge pull request #58 from vuntz/fix-utils_line-usage

Do not include \n in utils_line
There is no compattible logging form windows platform

Since there is no compattible logging from windows, do not apply the logging package / templates if the platform is windows.