Fast, configurable, shell plugin manager

Features
- Plugins from Git repositories.
  * Branch / tag / commit support.
  * Submodule support.
  * First class support for GitHub repositories.
  * First class support for Gists.
- Arbitrary remote scripts or binary plugins.
- Local plugins.
- Inline plugins.
- Highly configurable install methods using templates.
- Shell agnostic, with sensible defaults for Zsh.
- Super-fast plugin loading and parallel installation
- Config file using TOML syntax.
- Clean ~/.zshrc or ~/.bashrc (just add 1 line).