Add 18n support to the editor.

mindplot/resources/messages_en.properties

@@ -0,0 +1,45 @@
+ZOOM_IN=Zoom In
+ZOOM_OUT=Zoom Out
+TOPIC_SHAPE=Topic Shape
+TOPIC_ADD=Add Topic
+TOPIC_DELETE=Delete Topic
+TOPIC_ICON=Add Icon
+TOPIC_LINK=Add Link
+TOPIC_RELATIONSHIP=Relationship
+TOPIC_COLOR=Topic Color
+TOPIC_BORDER_COLOR=Topic Border Color
+TOPIC_NOTE=Add Note
+FONT_FAMILY=Font Type
+FONT_SIZE=Text Size
+FONT_BOLD=Text Bold
+FONT_ITALIC=Text Italic
+UNDO_EDITION=Undo Edition
+REDO_EDITION=Redo Edition
+UNDO=Undo
+REDO=Redo
+INSERT=Insert
+SAVE=Save
+NOTE=Note
+
+ADD_TOPIC=Add Topic
+LOADING=Loading ...
+EXPORT=Export
+PRINT=Print
+PUBLISH=Publish
+COLLABORATE=Share
+HISTORY=History
+DISCARD_CHANGES=Discard Changes
+FONT_COLOR=Text Color
+SAVING=Saving ...
+SAVE_COMPLETE=Save Complete
+
+ZOOM_IN_ERROR=Zoom too high.
+ZOOM_ERROR=No more zoom can be applied.
+ONLY_ONE_TOPIC_MUST_BE_SELECTED=Could not create a topic. Only one node must be selected.
+ONE_TOPIC_MUST_BE_SELECTED=Could not create a topic. One topic must be selected.
+SAVE_COULD_NOT_BE_COMPLETED=Save could not be completed. Try latter.
+UNEXPECTED_ERROR_LOADING=We're sorry, an unexpected error has occurred.\nTry again reloading the editor.If the problem persists, contact us to support@wisemapping.com.
+MAIN_TOPIC=Main Topic
+SUB_TOPIC=Sub Topic
+ISOLATED_TOPIC=Isolated Topic
+CENTRAL_TOPIC=Central Topic