remove gtest debug lib
parse_iterator default construct
run gtest in ide and pause command window
add dad file for test
test std::advance for recognize iterator and algorithm
copy source code of std::advance to test project
parse iterator:implement default and real contruct,operator ==.
parse_iterator: implement copy construct
parse_iterator:implement operator !=
parse_iterator:remove ptr_,implement operator *
parse_iterator:change operator * for return reference type.implement operator ++
parse_iterator ok.