lighttpd: make bbappend version-independent

Signed-off-by: Mario Domenech Goulart <mario@ossystems.com.br>
qt4-embedded: make bbappend version-independent

Signed-off-by: Mario Domenech Goulart <mario@ossystems.com.br>
xserver-xorg: make bbappend version-independent

Signed-off-by: Mario Domenech Goulart <mario@ossystems.com.br>
Add build image with python

Just in case someone wants to program in python some day.

Signed-off-by: Stephano Cetola <scetola@reachtech.com>
add python-demo

This is mostly the same as the gtk-demo, however it uses PyGtk.

Signed-off-by: Stephano Cetola <scetola@reachtech.com>