minor, reworked the lang icon.
windows build, added xml support to python.
fixed focus issue on windows

When the activation code is requested, it kept the focus
even after it was destroyed. Thus 'spaces' and 'enters'
was not received by GCompris activities.
Fixed windows compilation issue.

On windows we don't do DLLs so all local variables
must be unique globally or declared static.
gletters, fixed a memory leak.
lang, improved the enter text exercise

Now only one more char is displayed uppon
children error.
Release 13.08RC1