make hard-coded strings localizable

stepmania/Themes/default/Languages/en.ini

@@ -1519,3 +1519,12 @@ Song=Song
 Steps=Steps
 Course=Course
 Modifier=Modifier
+
+[RageDisplay_OGL]
+Obtain an updated driver from your video card manufacturer.=Obtain an updated driver from your video card manufacturer.
+GLDirect was detected.  GLDirect is not compatible with this game and should be disabled.=GLDirect was detected.  GLDirect is not compatible with this game and should be disabled.
+
+[RageDisplay_D3D]
+DirectX 8.1 or greater is not installed.  You can download it from:=DirectX 8.1 or greater is not installed.  You can download it from:
+Your system is reporting that Direct3D hardware acceleration is not available.  Please obtain an updated driver from your video card manufacturer.=Your system is reporting that Direct3D hardware acceleration is not available.  Please obtain an updated driver from your video card manufacturer.
+

stepmania/src/RageDisplay_D3D.cpp

@@ -14,6 +14,7 @@
 #include "RageSurfaceUtils.h"
 #include "EnumHelper.h"
 #include "DisplayResolutions.h"
+#include "LocalizedString.h"
 
 #include <D3D8.h>
 #include <D3dx8math.h>
@@ -203,10 +204,11 @@ RageDisplay_D3D::RageDisplay_D3D()
 
 }
 
-#define D3D_NOT_INSTALLED \
-	"DirectX 8.1 or greater is not installed.  You can download it from:\n" \
-	"http://www.microsoft.com/downloads/details.aspx?FamilyID=a19bed22-0b25-4e5d-a584-6389d8a3dad0&displaylang=en"
 
+static LocalizedString D3D_NOT_INSTALLED ( "RageDisplay_D3D", "DirectX 8.1 or greater is not installed.  You can download it from:" );
+const RString D3D_URL = "http://www.microsoft.com/downloads/details.aspx?FamilyID=a19bed22-0b25-4e5d-a584-6389d8a3dad0&displaylang=en";
+static LocalizedString HARDWARE_ACCELERATION_NOT_AVAILABLE ( "RageDisplay_D3D", 
+	"Your system is reporting that Direct3D hardware acceleration is not available.  Please obtain an updated driver from your video card manufacturer." );
 RString RageDisplay_D3D::Init( const VideoModeParams &p, bool bAllowUnacceleratedRenderer )
 {
 	GraphicsWindow::Initialize( true );
@@ -221,7 +223,7 @@ RString RageDisplay_D3D::Init( const VideoModeParams &p, bool bAllowUnaccelerate
 #else
 	g_D3D8_Module = LoadLibrary("D3D8.dll");
 	if(!g_D3D8_Module)
-		return D3D_NOT_INSTALLED;
+		return D3D_NOT_INSTALLED.GetValue() + "\n" + D3D_URL;
 
 	pDirect3DCreate8 = (Direct3DCreate8_t) GetProcAddress(g_D3D8_Module, "Direct3DCreate8");
 	if(!pDirect3DCreate8)
@@ -239,9 +241,8 @@ RString RageDisplay_D3D::Init( const VideoModeParams &p, bool bAllowUnaccelerate
 	}
 
 	if( FAILED( g_pd3d->GetDeviceCaps(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, &g_DeviceCaps) ) )
-		return
+		return HARDWARE_ACCELERATION_NOT_AVAILABLE;
-			"Your system is reporting that Direct3D hardware acceleration is not available.  "
+			
-			"Please obtain an updated driver from your video card manufacturer.\n\n";
 
 	D3DADAPTER_IDENTIFIER8	identifier;
 	g_pd3d->GetAdapterIdentifier( D3DADAPTER_DEFAULT, 0, &identifier );

stepmania/src/RageDisplay_OGL.cpp

@@ -44,6 +44,7 @@
 #include "Foreach.h"
 #include "ProductInfo.h"
 #include "DisplayResolutions.h"
+#include "LocalizedString.h"
 
 #include "arch/LowLevelWindow/LowLevelWindow.h"
 
@@ -387,6 +388,8 @@ void InitScalingScript()
 	GLExt.glVertexAttrib2fARB( ATTRIB_TEXTURE_MATRIX_SCALE, 1, 1 );
 }
 
+static LocalizedString OBTAIN_AN_UPDATED_VIDEO_DRIVER ( "RageDisplay_OGL", "Obtain an updated driver from your video card manufacturer." );
+static LocalizedString GLDIRECT_IS_NOT_COMPATIBLE ( "RageDisplay_OGL", "GLDirect was detected.  GLDirect is not compatible with this game and should be disabled." );
 RString RageDisplay_OGL::Init( const VideoModeParams &p, bool bAllowUnacceleratedRenderer )
 {
 	g_pWind = MakeLowLevelWindow();
@@ -408,7 +411,7 @@ RString RageDisplay_OGL::Init( const VideoModeParams &p, bool bAllowUnaccelerate
 	if( g_pWind->IsSoftwareRenderer(sError) )
 	{
 		if( !bAllowUnacceleratedRenderer )
-			return sError + "  Please obtain an updated driver from your video card manufacturer.\n\n";
+			return sError + "  " + OBTAIN_AN_UPDATED_VIDEO_DRIVER.GetValue() + "\n\n";
 		LOG->Warn( "Low-performance OpenGL renderer: " + sError );
 	}
 
@@ -418,7 +421,7 @@ RString RageDisplay_OGL::Init( const VideoModeParams &p, bool bAllowUnaccelerate
 	 * too using Direct3D directly.  (If we can't, it's a bug that we can work
 	 * around--if GLDirect can do it, so can we!) */
 	if( !strncmp( (const char *) glGetString(GL_RENDERER), "GLDirect", 8 ) )
-		return "GLDirect was detected.  GLDirect is not compatible with " PRODUCT_NAME ", and should be disabled.\n";
+		return GLDIRECT_IS_NOT_COMPATIBLE.GetValue() + "\n";
 #endif
 
 	/* Log this, so if people complain that the radar looks bad on their