Merge branch 'RefactorPrint'

- Modifies printing model to be similar to glabels-3.x.
   - Allow simple projects to print by-the-page (#51)
   - Added collated vs uncollated document merges
- Added ability to separate merge groups by page
- Updated man pages
- Updated misc developer documentation

model/Variables.cpp

@@ -118,6 +118,21 @@ namespace glabels
 		}
 
 		
+		///
+		/// Reset "on copy" variables to their initial values
+		///
+		void Variables::resetOnCopyVariables()
+		{
+			for ( auto& v : *this )
+			{
+				if ( v.increment() == Variable::Increment::PER_COPY )
+				{
+					v.resetValue();
+				}
+			}
+		}
+
+		
 		///
 		/// Increment variables on item
 		///