make pango optionnal and add debuging functions
rewrite unmanage code path
make DestroyEvent handle as Unmap Event
do not manage composite overlay
add debug infos
allow managed_rendering to check if graphical objects request rendering
proper use of pango-cairo
restore the old font rendering layout
do not destroy xc_left_ptr to many times
load fonts description only ones
initialize pango_font_map and pango_context only once