Const and Warning Correctness

const method correctness
fix some warnings
Missing Render method added back
Fix examples to use new NeoShaderBase

examples/bitmaps/NeoPixelBufferShader/NeoPixelBufferShader.ino

@@ -36,12 +36,12 @@ const RgbColor White(255);
 const RgbColor Black(0);
 
 // define a custom shader object that provides brightness support
-// based upon the NeoBitsBase
-template<typename T_COLOR_FEATURE> class BrightnessShader : public NeoBitsBase
+// based upon the NeoShaderBase
+template<typename T_COLOR_FEATURE> class BrightnessShader : public NeoShaderBase
 {
 public:
   BrightnessShader():
-    NeoBitsBase(),
+    NeoShaderBase(),
     _brightness(255) // default to full bright
   {}
 

examples/bitmaps/NeoPixelDibTest/NeoPixelDibTest.ino

@@ -34,12 +34,12 @@ const RgbColor White(255);
 const RgbColor Black(0);
 
 // define a custom shader object that provides brightness support
-// based upon the NeoBitsBase
-class BrightnessShader : public NeoBitsBase
+// based upon the NeoShaderBase
+class BrightnessShader : public NeoShaderBase
 {
 public:
   BrightnessShader():
-    NeoBitsBase(),
+    NeoShaderBase(),
     _brightness(255) // default to full bright
   {}