tests/EncodedPolyline: Fixed indent
Format/EncodedPolyline: Added opt_factor parameter to encode/decode()
Format/EncodedPolyline: Change default factor to 1e5

This matches the factors in the other methods and the default of the
original algorithm. Having this set at 1 before can be considered
as a bug.
Merge pull request #981 from Turbo87/encoded-polyline

Small Encoded Polyline bugfix (r=@bartvde)