Move doxygen docs into subsection for partioning

src/docs/MainPage.dox

@@ -23,7 +23,7 @@ Otherwise, the library user must first create a set of coefficients using
 \ref iir_coeff_new(). Any number of filters can then be instantiated using that
 set of coefficients with \ref iir_filter_new(), or the coefficients can be
 chained on to the end of an existing filter instance with
-\ref iir_filter_chain(). See \ref common_filters for functions to generate
+\ref iir_filter_chain(). See \ref libiir_common_filters for functions to generate
 coefficients.
 
 \section operation Filter operation

src/libiir/200_iir.h

@@ -7,7 +7,13 @@
 
 
 
-/*! \defgroup iir Basic IIR filtering
+/*! \defgroup libiir C library */
+
+
+
+/*! \defgroup libiir_iir Basic IIR filtering
+
+\ingroup libiir
 
 The functions in this module present a basic interface for representing IIR
 filters, creating instances of (possibly chained) IIR filters, and filtering an

src/libiir/300_common_filters.h

@@ -7,7 +7,9 @@
 
 
 
-/*! \defgroup common_filters Common types of IIR filter
+/*! \defgroup libiir_common_filters Common types of IIR filter
+
+\ingroup libiir
 
 Functions to create coefficients for various common types of IIR filter. The
 coefficient structures which are returned may be used to instantiate IIR

src/libiir/400_parser.h

@@ -7,7 +7,9 @@
 
 
 
-/*! \defgroup parser Parser for user-specified IIR filters
+/*! \defgroup iir_parser Parser for user-specified IIR filters
+
+\ingroup libiir
 
 This is a high-level interface that can instantiate a set of IIR filters based
 on a user-specified, human-readable string. The intention of this interface is

src/libiir/500_response.h

@@ -7,7 +7,9 @@
 
 
 
-/*! \defgroup response Measuring IIR response
+/*! \defgroup iir_response Measuring IIR response
+
+\ingroup libiir
 
 These functions allow measuring the IIR response (i.e. frequency and phase of
 the transfer function) at a given frequency. The response is a complex number;