Kraken: new api ptobject external_code
Kraken: replace tab per spaces
Kraken: in place_code api use case, and factorization
Protobuf: begin PlaceCodeRequest_Type enum at 0

To solve a problem with flat_enum
Kraken: remove a useless break

to remove a warning with clang
Type: fix size of static constexpr typename
Protobuf: identation problem
PT_Data::build_uri factorization
Protobuf: factorize fill_pb_placemark
Pt_data: change size of enum
Merge pull request #599 from l-vincent-l/add_pt_object_ext_code

Kraken: new api ptobject external_code