[Docs] Added a development section to the readme. (See #9)

daemon can be configured to send user defined actions, like turn an actor on,

off or just toggle it.

- [About the project](#about-the-project)

- [About the setup](#about-the-setup)

- [Requirements](#requirements)

- [Installation](#installation)

  - [Process management](#process-management)

- [Development](#development)

## About the project

## About the setup

## Requirements

## Installation

## Development

The project is written in C and comes with a bulk of predefined GNU Make

targets to speed up common development tasks. To get in touch just fork and

clone the project, install/build the required dependencies and fire a `make

build`.

The most adorable targets are `clean build test` (in this order :)). While

editing the man pages you can easily review the latest state with the `docs-*`

targets. (currently there are: `docs-avmctl.1 docs-avm-motion-trigger.conf.5

docs-avm-motion-triggerd.1`)

The project comes with a whole bunch of simple test binaries which covers

single aspects of the project en bloc.  All test cases can be easily accessed

with their corresponding `test-*` and `test-mem-*` targets. The `test-mem-*`

variants will be checked for memory leaks by valgrind. Here is a list of the

currently available GNU Make targets:

```

test-ambient-light-level test-build-url test-config test-list-switches

test-logger test-login test-mem-ambient-light-level test-mem-build-url

test-mem-config test-mem-list-switches test-mem-logger test-mem-login

test-mem-password-challenge test-mem-password-response test-mem-pidfile

test-mem-pir-motion-detection test-mem-switch-off test-mem-switch-on

test-mem-switch-toggle test-password-challenge test-password-response

test-pidfile test-pir-motion-detection test-switch-off test-switch-on

test-switch-toggle

```

Please mind the [Contribution Guide][] and the given [.editorconfig file][] if

you plan to work on the project.

[avm-motion-triggerd]: ../../wikis/man/avm-motion-triggerd.1.html

[avm-motion-trigger.conf]: ../../wikis/man/avm-motion-trigger.conf.5.html

[Contribution Guide]: CONTRIBUTING.md

[.editorconfig file]: .editorconfig