Features:

--Add support for Exr files which use 32-bit floats for each RGBA channel. Seems to come out too washed out.
--Allow for clearing an individual color curve.
--Allow for saving multiple image types in EmberRender and EmberAnimate. All writes are threaded.
--Remove --bpc command line argument. Add format png16 as a replacement.
--Remove --enable_jpg_comments and --enable_png_comments command line arguments, and replace them with --enable_comments which applies to jpg, png and exr.
--Add menu items to variations and affine spinners which allow for easy entry of specific numeric values like pi.
--Make final render dialog be wider rather than so tall.

Bug fixes:
--Fix some OpenCL compile errors on Mac.
--Remove ability to save bitmap files on all platforms but Windows.

Code changes:
--New dependency on OpenEXR.
--Allow Curves class to interact with objects of a different template type.
--Make m_Curves member of Ember always use float as template type.
--Set the length of the curves array to always be 2^17 which should offer enough precision with new 32-bit float pixel types.
--Set pixel types to always be 32-bit float. This results in a major reduction of code in the final accumulation part of Renderer.h/cpp.
--Remove corresponding code from RendererCL and FinalAccumOpenCLKernelCreator.
--Remove Transparency, NumChannels and BytesPerPixel setters from Renderer.h/cpp.
--Add new global functions to format final image buffers and place all alpha calculation and scaling code in them.
--Blending is no longer needed in OpenGLWidget because of the new pixel type.
--Make new class, AffineDoubleSpinBox.
--Attempt to make file save dialog code work the same on all OSes.
--Remove some unused functions.

Source/Fractorium/FractoriumSettings.h

@@ -16,6 +16,7 @@
 #define SHOWXFORMS           "render/showxforms"
 #define SHOWGRID             "render/showgrid"
 #define TOGGLETYPE			 "render/toggletype"
+#define PNG16BIT			 "render/png16bit"
 #define DEVICES				 "render/devices"
 #define THREADCOUNT          "render/threadcount"
 #define CPUDEFILTER			 "render/cpudefilter"
@@ -50,6 +51,7 @@
 #define FINALSAVEXML		 "finalrender/savexml"
 #define FINALDOALL		     "finalrender/doall"
 #define FINALDOSEQUENCE	     "finalrender/dosequence"
+#define FINALPNG16BIT        "finalrender/png16bit"
 #define FINALKEEPASPECT		 "finalrender/keepaspect"
 #define FINALSCALE			 "finalrender/scale"
 #define FINALEXT			 "finalrender/ext"
@@ -124,6 +126,9 @@ public:
 	bool ToggleType();
 	void ToggleType(bool b);
 
+	bool Png16Bit();
+	void Png16Bit(bool b);
+
 	bool ContinuousUpdate();
 	void ContinuousUpdate(bool b);
 
@@ -220,6 +225,9 @@ public:
 	bool FinalDoSequence();
 	void FinalDoSequence(bool b);
 
+	bool FinalPng16Bit();
+	void FinalPng16Bit(bool b);
+
 	bool FinalKeepAspect();
 	void FinalKeepAspect(bool b);