Allow user variables to be set from glabels-batch command line (#75)

model/Variables.cpp

@@ -85,6 +85,27 @@ namespace glabels
 		}
 
 
+		///
+		/// Set initial value of multiple variables
+		///
+		void Variables::setVariables( const QMap<QString,QString>& definitions )
+		{
+			for ( auto& name : definitions.keys() )
+			{
+				if ( hasVariable( name ) )
+				{
+					(*this)[name].setInitialValue( definitions[name] );
+				}
+				else
+				{
+					addVariable( Variable( Variable::Type::STRING,
+					                       name,
+					                       definitions[name] ) );
+				}
+			}
+		}
+		
+
 		///
 		/// Reset variables to their initial values
 		///