skip shebang in the first line

Something like this works now:

===
% PATH="./bin:$PATH" ./sum.ktscript 31 21
31 + 21 = 52

% cat sum.ktscript
#!/usr/bin/env kotlin -script

val a = Integer.parseInt(args[0])
val b = Integer.parseInt(args[1])
println("$a + $b = ${a + b}")
===

idea/src/org/jetbrains/jet/plugin/highlighter/JetHighlighter.java

@@ -82,6 +82,7 @@ public class JetHighlighter extends SyntaxHighlighterBase {
         keys.put(JetTokens.CHARACTER_LITERAL, JetHighlightingColors.STRING);
 
         keys.put(JetTokens.EOL_COMMENT, JetHighlightingColors.LINE_COMMENT);
+        keys.put(JetTokens.SHEBANG_COMMENT, JetHighlightingColors.LINE_COMMENT);
         keys.put(JetTokens.BLOCK_COMMENT, JetHighlightingColors.BLOCK_COMMENT);
         keys.put(JetTokens.DOC_COMMENT, JetHighlightingColors.DOC_COMMENT);