Fix typo in plugin API at utils_mkdir().
Add document_get_n_idx() to the plugin API.
Fix display of plugin separator in the Tools menu when only plugins without menu item are loaded.
Add three new signals: project_open, project_save, project_close.
On Shutdown close the project before plugins are unloaded to let plugins work on the last project closed event.			


git-svn-id: https://geany.svn.sourceforge.net/svnroot/geany/trunk@2065 ea778897-0a13-0410-b9d1-a72fbfd435f5