Add branch/merge: Cover()

1) Command:

//cover a split/join pattern into canvas

pmb.Cover( "003" , "005" ,

VertexBuilder.CreateSplit(GatewayDirectionEnum.AndSplit, "AndSplit" , "AndSplicCode" ),
VertexBuilder.CreateJoin(GatewayDirectionEnum.AndJoin, "AndJoin" , "AndJoinCode" ),
VertexBuilder.CreateTask( "branchTask001" , "b001" ),

VertexBuilder.CreateTask( "branchTask002" , "b002" )

)

.Update();

2) Graphical example after command execution: