Combine git push steps.
Add install_requires to metadata.
Add ``url`` function for combining url parts and params into a single url.
Fix snake_case() so that text is converted to lower case.
Fix argument name in url() docstring.
Support escaping "." characters in path string keys.

Refs #32
Add reverse().

Refs #34
Update changes.
Add append, join, pop, push, shift, sort, splice, unshift, and concat.

Closes #34
Adapt sort() to work consistently between Python 3 and 2.

This means that a comparison and key function cannot be used together.
PEP8
Add test for exception in sort().
Add deep_get and deep_set.

Refs #32
Make has() work with deep paths and make has_path() and deep_has() aliases.

Refs #32
Revert behavior of has() so that it's not deep.
Add deep_pluck(), deep_property(), and deep_prop().

Refs #32
Make get_path() handle list indexing using strings.

Refs #32
Add deep_map_values().

Refs #32
Add docstring for deep_pluck().

Refs #32
PEP8