Introduce a style flag in the manager to simplify enabling pane stacking
Merge branch 'aui-dynamic-notebook' of https://github.com/nhold/wxWidgets into wxAuiExperimentalFixes
Fixed normal panes content not showing back when the pane is unhidde and the pane might have been part of a notebook, but not allowed so.
Simplified code by removing internal IsNotebookPane()
Introduced wxAUI_MGR_NB_ALLOW_NOTEBOOKS manager style flag to simply allow pane stacking
Forced wxAUI_MGR_NB_ALLOW_NOTEBOOKS in wxAuiNotebook
Fix for issue #58: GetManager() returns the wrong manager if the queried window is itself a wxAui frame
Fix for issue #46: make sure the border of panes in tabs are procesed as such in all cases and not only when in wxAuiNotebook
Fix for #46 on simple tab art. It was so obvious !
Merge pull request #57 from lpoujoulat/wxAuiExperimentalFixes

Use a style flag to enable dynamic notebooks #56 and fix for issue #55