Fix issue #42: Changing/Changed events are now triggered as expected in wxAuiNotebook. This restores backward compatibility regarding this (and a sane behavior too)
Fix issue #43: wxAUI_NB_TAB_MOVE has no effect if wxAUI_NB_TAB_SPLIT is not set. The two flags are now really independant
Merge pull request #44 from lpoujoulat/wxAuiExperimentalFixes

Fixes for issues #42 and #43