Adding new Cortex logo graphics.

Also installing them for IECoreHoudini and using the for ParameterisedHolders, Converter SOP, and SceneCache ROP. Still need to replace the other SceneCache icons, but those will be customized by function

SConstruct

@@ -2670,7 +2670,7 @@ if doConfigure :
 		#=====
 		# install icons
 		#=====
-		houdiniIcons = glob.glob( "icons/IECoreHoudini/*.svg" )
+		houdiniIcons = glob.glob( "icons/IECoreHoudini/*.svg" ) + glob.glob( "graphics/CortexLogo*.svg" )
 		houdiniIconInstall = houdiniPluginEnv.Install( "$INSTALL_HOUDINIICON_DIR", source=houdiniIcons )
 		houdiniPluginEnv.Alias( "install", houdiniIconInstall )
 		houdiniPluginEnv.Alias( "installHoudini", houdiniIconInstall )

src/IECoreHoudini/plugin/Plugin.cpp

@@ -87,21 +87,21 @@ void newSopOperator(OP_OperatorTable *table)
 		SOP_OpHolder::create, SOP_ParameterisedHolder::parameters, 0, 4,
 		SOP_ParameterisedHolder::variables, OP_FLAG_GENERATOR
 	);
-	opHolder->setIconName( "SOP_ieOpHolder" );
+	opHolder->setIconName( "CortexLogoMini" );
 
 	OP_Operator *proceduralHolder = new OP_Operator(
 		"ieProceduralHolder", "Cortex Procedural",
 		SOP_ProceduralHolder::create, SOP_ParameterisedHolder::parameters, 0, 4,
     		SOP_ParameterisedHolder::variables, OP_FLAG_GENERATOR
 	);
-	proceduralHolder->setIconName( "SOP_ieProceduralHolder" );
+	proceduralHolder->setIconName( "CortexLogoMini" );
 
 	OP_Operator *converter = new OP_Operator(
 		SOP_CortexConverter::typeName, "Cortex Convert",
 		SOP_CortexConverter::create, SOP_CortexConverter::parameters, 1,	1,
 		SOP_CortexConverter::variables, OP_FLAG_GENERATOR
 	);
-	converter->setIconName( "SOP_ieCortexConverter" );
+	converter->setIconName( "CortexLogoMini" );
 
 	OP_Operator *cacheReader = new OP_Operator(
 		"ieInterpolatedCacheReader", "Interpolated Cache Reader",
@@ -160,8 +160,7 @@ void newDriverOperator( OP_OperatorTable *table )
 		ROP_SceneCacheWriter::create, ROP_SceneCacheWriter::buildParameters(), 0, 999, 0,
 		OP_FLAG_GENERATOR
 	);
-	/// \todo: get a new icon
-	sceneCacheWriter->setIconName( "SOP_ieCortexConverter" );
+	sceneCacheWriter->setIconName( "CortexLogoMini" );
 
 	table->addOperator( sceneCacheWriter );