Update dbase-rs to 0.1.1

[tmontaigu]

The various iter_shapes_as iter_shapes_and_records_as now take &mut self instead of self to be able to use dbase::RecordIterator.

Move the purely shapefile related reader in a new ShapeReader struct and use it in the Reader struct. ShapeReader may be useful for projects wich don't care about dbf

Same thing for writing `ShapeWriter is a new struct that handle the writing of the shp and shx.

The Reader has a handle to a ShapeWriter and dbase::TableWriter.

Things to decide:

• Should the dbase::Reader of the Reader be mandatory and not an Option anymore ? Meaning Reader::from_path would error_out if the `.dbf`` is not found.

  The dbase::TableWriter is mandaoty to create a new shapefile::Writer because the esri spec seems to say that .dbf are mandaroty (and should contain at least on field), so by "symmetry" the shapefile::Reader should also require a dbf file

TODO:

• [x] Creating a Writer Using the dbf info from a Reader.
• [x] Documentation
• [ ] Release new dbase version & update Cargo.toml to use it

Writing shapes / records one by one as oppposed to all at once should be added in another pr

Addresses #16