Add the svn:eol-style property onto new files which where missing it to ensure uniform line endings.

Replace ring buffer library in Benito and USBtoSerial projects with the new lightweight ring buffer header to improve reliability.

Add svn:eol-style property to source files, so that the line endings are correctly converted to the target system's native end of line style.

Moved USBtoSerial demo the Projects directory, as it is simply an expanded CDC demo. Added const qualifier to Endpoint/Pipe stream write routines.