Added cmake configuration option for api dox location. This provides

flexibility when building for different distros, in case the location of
the api dox need to be different.

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>

CMakeLists.txt

@@ -65,7 +65,11 @@ add_definitions(
   ${TQT_CFLAGS_OTHER}
 )
 
-set( APIDOX_HTML_DIRECTORY "usr/share/doc/libdbus-1-tqt/HTML" )
+if( CMAKE_APIDOX_HTML_DIRECTORY )
+	set( APIDOX_HTML_DIRECTORY "${CMAKE_APIDOX_HTML_DIRECTORY}" )
+else()
+	set( APIDOX_HTML_DIRECTORY "usr/share/doc/libdbus-1-tqt/HTML" )
+endif()
 set( APIDOX_DIRECTORY "${CMAKE_BINARY_DIR}/${APIDOX_HTML_DIRECTORY}/en" )