EyeWaveform: added some doxygen comments

Author: azonenberg

scopehal/EyeWaveform.h

@@ -31,13 +31,20 @@
 	@file
 	@author Andrew D. Zonenberg
 	@brief Declaration of EyeWaveform
+	@ingroup datamodel
  */
 
 #ifndef EyeWaveform_h
 #define EyeWaveform_h
 
 #include "../scopehal/DensityFunctionWaveform.h"
 
+/**
+	@brief An eye-pattern waveform
+	@ingroup datamodel
+
+	May be generated by a filter or directly measured by a BERT, sampling oscilloscope, etc.
+ */
 class EyeWaveform : public DensityFunctionWaveform
 {
 public: