DOC: add comments on the configuration file

CMake/GenerateConfigProperties.cpp

@@ -64,17 +64,21 @@ int main(int argc, char* argv[])
    std::string language = "en_EN.UTF-8";
    
    /** Write parameters to the configuration file*/
-   os << "#Auto generated by config-properties \n"
+   os << "# Auto generated by config-properties \n\n"
+      << "# Language for the GUI application based on otb\n"
+      << "# for example OTB_LANG=en_EN.UTF-8\n"
       << "OTB_LANG="
       <<  language
-      << "\n"
+      << "\n\n"
+      << "# Image size (in byte) to activate the streaming\n"
       << "OTB_STREAM_IMAGE_SIZE_TO_ACTIVATE_STREAMING="
       <<  paramVector[0]
-      << "\n"
+      << "\n\n"
+      << "# Buffer size when the streaming is activated\n"
       << "OTB_STREAM_MAX_SIZE_BUFFER_FOR_STREAMING="
       <<  paramVector[1]
-      << "\n"
-      << "#End of config file properties generation"
+      << "\n\n"
+      << "#End of config file properties generation\n"
       << std::endl;
    
    os.close();