Manually define the end of line character sequence

Be able to choose in options of Qt Creator the end of line character sequence between "crlf" (carriage return + line feed), "lf" (line feed) or automatic (as now).

I work on Windows on a multiplatform project and all files must be use the "lf" end line, when I create a new file with Qt Creator it will use the "crlf" end line characters, I have to convert the file with an external tool.