Added support for referencing / refactoring of global variables and symbols. Added getPresentation() for structural view, but does not seem to be working yet. Also Find Usages still reports "Unclassified" :-/

src/test/resources/references/labels/global_labels.asm

@@ -0,0 +1,13 @@
+        bsr     init
+        bsr     main<caret>
+        bsr     exit
+        rts
+
+init    moveq.l #-1,d0
+        rts
+
+main    moveq.l #0,d0
+        rts
+
+exit    illegal
+        rts

src/test/resources/references/labels/global_labels_after_rename.asm

@@ -0,0 +1,13 @@
+        bsr     init
+        bsr     intro_main
+        bsr     exit
+        rts
+
+init    moveq.l #-1,d0
+        rts
+
+intro_main    moveq.l #0,d0
+        rts
+
+exit    illegal
+        rts

src/test/resources/references/labels/symbol_assignment.asm

@@ -0,0 +1,17 @@
+PIC_WIDTH = 320
+PIC_HEIGTH equ 256
+
+        bsr     init
+        bsr     main
+        bsr     exit
+        rts
+
+init    move.w  #PIC_WIDTH,d0
+        move.w  #PIC_<caret>HEIGTH,d1
+        rts
+
+main    moveq.l #0,d0
+        rts
+
+exit    illegal
+        rts

src/test/resources/references/labels/symbol_assignment_after_rename.asm

@@ -0,0 +1,17 @@
+PIC_WIDTH = 320
+PIC_HEIGHT equ 256
+
+        bsr     init
+        bsr     main
+        bsr     exit
+        rts
+
+init    move.w  #PIC_WIDTH,d0
+        move.w  #PIC_HEIGHT,d1
+        rts
+
+main    moveq.l #0,d0
+        rts
+
+exit    illegal
+        rts