add scale/zero point for relu6 quantize handling

Author: vera121

FEATURES.md

@@ -131,6 +131,7 @@ InnerProductParameter
 ConcatParameter  
 EltwiseParameter  
 PoolingParameter  
+ReLUParameter  
 SigmoidParameter  
 SoftmaxParameter  
 

src/caffe/proto/caffe.proto

@@ -2326,6 +2326,10 @@ message ReLUParameter {
   optional bool relu6 = 3 [default = false]; //CUSTOMIZATION, if set true, the output is min(max(0, input), 6)
   optional float maximum = 6 [default = 0]; //CUSTOMIZATION, act as MAX range setting
   optional float minimum = 7 [default = 0]; //CUSTOMIZATION, act as MIN range setting
+  optional float input_scale = 13 [default = 1]; //CUSTOMIZATION
+  optional float output_scale = 14 [default = 1]; //CUSTOMIZATION
+  optional int32 input_zero_point = 15 [default = 0]; //CUSTOMIZATION
+  optional int32 output_zero_point = 16 [default = 0]; //CUSTOMIZATION
   //<--CUSTOMIZATION
   enum SaturateMethod {
     None = 0;