[dicttoolz] get_in

[hunterhogan]

humpy_toolz

• .pyi file: necessary until the entire module is annotated.
• Docstring: update and expand.
• Tests: annotate.
• Tests: expand.
• Curried version: check if it needs special treatment.

humpy_cytoolz

• .pyx file: add primary signature as first line of docstring.
• .pyx file: match docstring to humpy_toolz.
• .pyi file: add overload definitions.
• .pxd file: check if it needs special treatment.
• Tests: annotate.
• Tests: expand.
• .c file: compile.
• Curried version: check if it needs special treatment.

When complete

• Add to list of pull requests for pytoolz/cytoolz.
• Add to list of pull requests for pytoolz/toolz.
• If needed, pull request to mgrinshpon/toolz-stubs.