Add more debugging output
Check the return value of recursive calls to skip_map_or_array
Add a failing test for the pointer bug reported in https://github.com/maxmind/libmaxminddb/issues/2
Add new test file to t/Makefile.am
Add more debugging output
Don't run all tests if lookup fails

Otherwise just get a segfault
Make sure that entry_data is always zeroed out when MMDB_get_value returns an error status
Fix a bug in the pointer bug tests and generaly improve data_ok() in the test helper
Fix handling of pointers when looking up paths in an array or map

The array fix isn't tested, but it parallels the map fix.
Remove extra whitespace