Macro definitions are now word and indexed, macro calls reference to definition.

Macro definition refactoring and find usages support.
Structural View also shows macro definitions.
Missing REPT and ENDR assembler directives added.
Changed or added some icons at various places.
Reference search for global labels and symbols now uses stub index.

src/test/java/de/platon42/intellij/plugins/m68k/parser/MacroCallTest.kt

@@ -23,6 +23,11 @@ internal class MacroCallTest : AbstractParsingTest() {
         testGoodSyntax(testCase, " PUSHM d0/d3/d5-d7/a0-a2/a4-a6 ; save a couple of registers\n")
     }
 
+    @Test
+    internal fun call_with_label(@MyTestCase testCase: ParsingTestExtension.IParsingTestCase) {
+        testGoodSyntax(testCase, "label FOOBAR narf ; wut?\n")
+    }
+
     @Test
     internal fun putmsg_call_with_specially_bracketed_parameters(@MyTestCase testCase: ParsingTestExtension.IParsingTestCase) {
         // FIXME this doesn't work as intended...