Resolve "Improve document structure"

Closes #27 (closed)

chapters/about.md

+# SUB FE Technical Reference
+
+## About This Document
+
+**Author**: Software Quality Working Group\
+\
+**Audience**: Developers of the Research and Development Department of the Göttingen State and University Library.
+\
+**Purpose**: This guideline should help you getting started a new software development project (or improving an
+existing one!) in the Research and Development Department of the Göttingen State and University Library.
+
+Our goal is to establish better software quality by following standards the developer team has mutually agreed upon.
+Roughly basing on the [EURISE Network Technical Reference](https://eurise-network.github.io/), these standards are
+discussed, worked out, and decided in the Software Quality Working Group, which meets biweekly on Tuesdays at
+13:00--14:00. However, they aren't cast in stone, so in case you have a good idea for a better standard, feel free to
+contribute!\
+\
+**Status**: This document is a living document and will be extended as soon as the Software Quality Working Group has
+agreed upon a new standard for software projects in RDD.
+TODOs and addenda of this document are maintained [here](https://github.com/subugoe/rdd-technical-reference/issues/).