Source layout

README.md

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-Go to [the website](http://bitcoin.sipa.be/miniscript/).
+Go to [the Miniscript website](http://bitcoin.sipa.be/miniscript/).
+
+This repository contains a C++ implementation of Miniscript and a number of
+related things:
+* The core Miniscript module ([cpp](bitcoin/script/miniscript.cpp), [h](bitcoin/script/miniscript.h)) together with a number of [dependencies](bitcoin/) based on
+  the Bitcoin Core source code.
+* A policy to Miniscript compiler ([cpp](compiler.cpp), [h](compiler.h)).
+* Javascript wrappers for the website ([cpp](js_bindings.cpp)).
+* The project website ([.html](index.html)).