GeoTag CultureInvariant Parse fix

Fixes errors in floats and doubles parsers due to different cultures.
Merge pull request #488 from wjax/master

GeoTag CultureInvariant Parse fix
GeoTag GPS Time converter fix

Fixes LEAP seconds not being added
Fixes LEAP seconds not being 25 but 16 against UTC
Fixes Converted Time being local time instead of UTC
Merge pull request #489 from wjax/master

GeoTag GPS Time converter fix
Merge remote-tracking branch 'upstream/master'