/// \return true if module was successfully added.
bool addLayoutModule(std::string const & modName);
/// checks to make sure module's requriements are satisfied, that it does
/// not conflict with already-present modules, isn't already loaded, etc.
/// \return true if module was successfully added.
bool addLayoutModule(std::string const & modName);
/// checks to make sure module's requriements are satisfied, that it does
/// not conflict with already-present modules, isn't already loaded, etc.