Implement continuous tape labels and path-based label shapes.

- Added "roll" as a special paper id
- Added roll_width attribute to draw tape in previews
- Updated Brother QL-500/* label templates
- Preserve print dialog settings between print jobs.
- Added path based labels for arbitrary shaped labels.
- Fleshed out implementation of continuous labels.

model/Db.h

@@ -71,7 +71,6 @@ namespace glabels
 			static QString lookupPaperIdFromName( const QString& name );
 			static QString lookupPaperNameFromId( const QString& id );
 			static bool isPaperIdKnown( const QString& id );
-			static bool isPaperIdOther( const QString& id );
 
 			static void registerCategory( Category *category );
 			static const Category *lookupCategoryFromName( const QString& name );
@@ -134,8 +133,6 @@ namespace glabels
 
 			static QList<Template*> mTemplates;
 
-			static QString          mPaperNameOther;
-
 		};
 
 	}