--User changes

-Add Simon Detheridge's name to the About Box.

--Bug fixes
 -Fix bug in OpenCL atomic string, which is never used.
 -Wrong hist and accum allocation size in RendererCL when using float-only buffers now.
 -Move some kernel initialization to a place where it's done once per render, rather than on every interactive iter chunk.

--Code changes
 -Make ConvertCarToRas() just assign to the member rather than return a struct.
 -Make kernel string accessor functions in IterOpenCLKernelCreator, FinalAccumOpenCLKernelCreator and DEOpenCLKernelCreator be const and return a const string reference.
 -Don't include atomic string unless locking on the GPU, which is never.

Source/EmberTester/EmberTester.cpp

@@ -71,7 +71,7 @@ Ember<T> CreateBasicEmber(uint width, uint height, uint ss, T quality, T centerX
 string GetEmberCLKernelString(Ember<float>& ember, bool iter, bool log, bool de, uint ss, bool accum)
 {
 	ostringstream os;
-	IterOpenCLKernelCreator<float> iterCreator(false);
+	IterOpenCLKernelCreator<float> iterCreator;
 	DEOpenCLKernelCreator deCreator(false, false);
 	FinalAccumOpenCLKernelCreator accumCreator(false);
 	pair<string, vector<float>> pair;