added foreword

lattice-boltzmann.com/content/_index.md

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+Welcome to my opinionated lattice Boltzmann method (LBM) "blog". The aim of this project
+is to create a simple yet complete lattice Boltzmann solver and guide the reader through every
+step of the way. In order to be self consistent it will contain a theoretical presentation
+of the lattice Boltzmann method and present the derivation of the numerical method
+as well as a complete implementation. The idea behind this blog is also to
+introduce the reader to novel implementation techniques using functional programming.
+To this aim we will use the hardware agnostic [Futhark](https://futhark-lang.org/)
+that allows to target a vast amount of architectures (single/multi-core CPU to any
+possible GPU).
+
+The content in this blog does not claim to be a complete reference on the LBM,
+but rather a useful resource for beginners and more advanced researchers to understand the basics
+and also advanced implementation details on the method.
+
+