[gtkmm] Release : gtkmm-2.2.1 for win32

[Cedric Gustin <cedric gustin swing be>]

gtkmm-2.2.1 for mingw (win32 port) is now available for download on the 
usual site

http://www.pcpm.ucl.ac.be/~gustin/win32_ports/

either as an installer or individual file.

Among other new features, the installer now

1. includes the full documentation WITH the examples source files
2. gives the option of adding the gtkmm (and gtk+) runtime directory to 
your PATH. This currently only works on Win NT, 2k and XP and is not really 
recommended if you want to avoid DLL hell as much as possible.

I'm also thinking about moving from a Inno Setup generated installer to a 
NSIS one (smaller installer).

As usual, feel free to send any comment/bug report.

Cedric