Earth's radius

Using Google Maps JavaScript API default Earth's radius of 6378137 meters.

What's Changed

• Fix PolyUtil distanceToLine function. Close #11 by @gistrec in #12
• Added a way to edit the earth radius by @RetaxMaster in #17
• Fixed typo in the PolyUtil::isLocationOnEdgeOrPath() by @andykarpov in #16

New Contributors

• @gistrec made their first contribution in #12
• @RetaxMaster made their first contribution in #17
• @andykarpov made their first contribution in #16

Full Changelog: 1.0.2...1.0.3