Added support for memory attribute

examples/simplified FRISC model/schema.csl

@@ -3,6 +3,7 @@
 @schema {
     @instance proc FRISC {
         @position (0, 0)
+        @attribute _memory null
     }
 
     @instance mem Memorija {

examples/simplified FRISC model/schema2.csl

@@ -1,11 +1,12 @@
 @source "frisc_library.csl"
 
 @schema {
-	@instance procesor2 FRISC {
+	@instance proc FRISC {
 		@position (0, 0)
+		@attribute _memory mem
 	}
 
-	@instance memorija2 Memorija {
+	@instance mem Memorija {
 		@position (0, 250)
 		@attribute sinkroniziran false
 		@attribute brzina 1
@@ -14,7 +15,7 @@
 		@attribute pocetnaAdresa 1023
 	}
 
-	@instance bus2 glavnaSabirnica {
+	@instance bus glavnaSabirnica {
 		@position (0, 200)
 		@size 100
 	}
@@ -24,11 +25,11 @@
 		@size 0
 	}
 
-	@connection (procesor2.glavniPin, bus2) {
+	@connection (proc.glavniPin, bus) {
 	}
-	@connection (memorija2.glavniPin, bus2) {
+	@connection (mem.glavniPin, bus) {
 	}
-	@connection (procesor2.glavniPin, testBus, memorija2.glavniPin) {
+	@connection (proc.glavniPin, testBus, mem.glavniPin) {
 		@attribute dmaPoveznica "READY"
 		@attribute mmaPoveznica "PIO_DATA"
 	}