doc BUGFIX trees information organization

Remove duplicated groups of schema information and improve overall
organization and coverage for schema and data groups in doxygen.
diff --git a/Doxyfile.in b/Doxyfile.in
index 869013f..9abd406 100644
--- a/Doxyfile.in
+++ b/Doxyfile.in
@@ -561,7 +561,7 @@
 # name. If set to NO, the members will appear in declaration order.
 # The default value is: YES.
 
-SORT_MEMBER_DOCS       = NO
+SORT_MEMBER_DOCS       = YES
 
 # If the SORT_BRIEF_DOCS tag is set to YES then doxygen will sort the brief
 # descriptions of file, namespace and class members alphabetically by member
@@ -569,7 +569,7 @@
 # this will also influence the order of the classes in the class list.
 # The default value is: NO.
 
-SORT_BRIEF_DOCS        = NO
+SORT_BRIEF_DOCS        = YES
 
 # If the SORT_MEMBERS_CTORS_1ST tag is set to YES then doxygen will sort the
 # (brief and detailed) documentation of class members so that constructors and
@@ -581,14 +581,14 @@
 # detailed member documentation.
 # The default value is: NO.
 
-SORT_MEMBERS_CTORS_1ST = NO
+SORT_MEMBERS_CTORS_1ST = YES
 
 # If the SORT_GROUP_NAMES tag is set to YES then doxygen will sort the hierarchy
 # of group names into alphabetical order. If set to NO the group names will
 # appear in their defined order.
 # The default value is: NO.
 
-SORT_GROUP_NAMES       = NO
+SORT_GROUP_NAMES       = YES
 
 # If the SORT_BY_SCOPE_NAME tag is set to YES, the class list will be sorted by
 # fully-qualified names, including namespaces. If set to NO, the class list will
@@ -781,16 +781,7 @@
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = ./src/libyang.h \
-			 ./src/context.h \
-			 ./src/tree.h \
-                         ./src/tree_schema.h \
-                         ./src/plugins_types.h \
-                         ./src/plugins_exts.h \
-                         ./src/tree_data.h \
-                         ./src/log.h \
-                         ./src/set.h \
-                         ./src/dict.h
+INPUT                  = @DOXY_HEADERS@
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses