now we use boost::format through our own front-end util::_Fmt
solely, which both helps to reduce compilation time and code size,
and gives us a direct string conversion, which automatically
uses any custom operator string() available on arguments.
While desirable as such, I did this conversion now, since
it allows us to get rid of boost::str, which in turn helps
to drill down any remaning uses of our own util::str
(search & replace). Please feel free to add your name to any files to which you added any contributions.
ALL SOURCECODE IS LICENCED UNDER THE TERMS AND CONDITIONS OF THE GPL (2 and above)
avoid spurious quasi-global namespace cinelerra and use namespace hierarchies only where necessary.
document my intended use of namespaces/interfaces in the renderengine-wiki.
