Add HTML-based console viewer for easier real-time debug output

Since 1) debug output logging via the prefs isn't necessarily possible
for startup errors in Standalone, 2) real-time output is prohibitively
slow and has a miniscule scrollback buffer on Windows unless you use a
Cygwin or Git terminal, and 3) copying/pasting/emailing was annoying
anyway, make -ZoteroDebug open a popup window that shows errors and
debug output and allows submitting straight to the server with a Debug
ID.

This should replace the existing debug output viewer as well, but that's
less of a priority.

-ZoteroDebugText or the debug.log pref can still be used to dump to the
terminal.

components/zotero-service.js

@@ -485,9 +485,13 @@ function ZoteroCommandLineHandler() {}
 ZoteroCommandLineHandler.prototype = {
 	/* nsICommandLineHandler */
 	handle : function(cmdLine) {
-		// Force debug output
+		// Force debug output to window
 		if (cmdLine.handleFlag("ZoteroDebug", false)) {
-			zInitOptions.forceDebugLog = true;
+			zInitOptions.forceDebugLog = 2;
+		}
+		// Force debug output to text console
+		else if (cmdLine.handleFlag("ZoteroDebugText", false)) {
+			zInitOptions.forceDebugLog = 1;
 		}
 		
 		// handler to open Zotero pane at startup in Zotero for Firefox