Issue #30

-prevent exception when link is already absolute
Issue #32

works since  Issue #30 was fixed
try to fix an issue of #23

-setup dialog is in background
fixed an issue in #23

-"edit path" for monitoring node action
just to make sure

-check for AVirtualDirectory instance
should fix issue #25
Merge branch 'master' into ribbons

Conflicts:
	docear_plugin_bibtex/src/org/docear/plugin/bibtex/Reference.java
	docear_plugin_bibtex/src/org/docear/plugin/bibtex/ReferenceUpdater.java
	docear_plugin_bibtex/src/org/docear/plugin/bibtex/dialogs/ExistingReferencesDialog.java
	docear_plugin_bibtex/src/org/docear/plugin/bibtex/jabref/JabRefAttributes.java
	freeplane/src/org/freeplane/features/map/NodeModel.java