Add icon for debug window

doc/assets-attribution.txt

@@ -54,3 +54,7 @@ Designer: Crobbo (forum)
 Site: https://bitcointalk.org/index.php?topic=32273.0
 License: Public domain
 
+Icon: src/qt/res/icons/debugwindow.png
+Designer: Based on icon from Turbomilk
+Site: http://www.iconza.com/
+License: Free for commercial use

src/qt/bitcoin.qrc

@@ -39,6 +39,7 @@
         <file alias="key">res/icons/key.png</file>
         <file alias="filesave">res/icons/filesave.png</file>
         <file alias="qrcode">res/icons/qrcode.png</file>
+        <file alias="debugwindow">res/icons/debugwindow.png</file>
     </qresource>
     <qresource prefix="/images">
         <file alias="about">res/images/about.png</file>

src/qt/bitcoingui.cpp

@@ -256,7 +256,7 @@ void BitcoinGUI::createActions()
     backupWalletAction->setToolTip(tr("Backup wallet to another location"));
     changePassphraseAction = new QAction(QIcon(":/icons/key"), tr("&Change Passphrase..."), this);
     changePassphraseAction->setToolTip(tr("Change the passphrase used for wallet encryption"));
-    openRPCConsoleAction = new QAction(tr("&Debug window"), this);
+    openRPCConsoleAction = new QAction(QIcon(":/icons/debugwindow"), tr("&Debug window"), this);
     openRPCConsoleAction->setToolTip(tr("Open debugging and diagnostic console"));
     verifyMessageAction = new QAction(QIcon(":/icons/transaction_0"), tr("&Verify message..."), this);
     verifyMessageAction->setToolTip(tr("Verify a message signature"));