feat: use pipenv to manage the development environment (#784)

[Pipenv][0] makes it easier to maintain a consistent development
environment for projects using Python. You no longer need to manage
`pip` and `virtualenv` separately, nor deal with the drift and other
issues requirements.txt brings. It enables gaining insights into your
dependency graph, but most importantly - it enables deterministic
builds, which prevents the entire class of "it works on my machine"
problems.

[Pipenv][0] is similar to package managers from other ecosystems, such
as Node.js' `npm` or Rust's `cargo`. Additionally, [Pipenv][0] is an
[officially recommended package manager][1] by the Python project.

This patch brings [Pipenv][0] to the wee-slack project to simplify the
development and contribution experience. Additionally, this patch brings
basic contributing documentation to help onboarding.

[0]: https://github.com/pypa/pipenv
[1]: https://packaging.python.org/tutorials/managing-dependencies/#managing-dependencies

1 files changed, 6 insertions, 0 deletions

diff --git a/README.md b/README.md
index dcbfbfd..cb827ec 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,7 @@ A WeeChat native client for Slack.com. Provides supplemental features only avail
 Table of Contents
 -----------------
   * [Features](#features)
+  * [Contributing](#contributing)
   * [Dependencies](#dependencies)
   * [Setup](#setup)
      * [1. Install dependencies](#1-install-dependencies)
@@ -58,6 +59,11 @@ Features
   * Expands/shows metadata for things like tweets/links
   * *Super fun* debug mode. See what the websocket is saying
 
+Contributing
+------------
+
+See [docs/contributing.md](./docs/contributing.md).
+
 Dependencies
 ------------
   * WeeChat 1.3+ http://weechat.org/