Add details to README

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 # Aedile
 
-C++ System Development Kit for Nostr
+A Nostr System Development Kit written in C++.
+
+## Behind the Name
+
+In the ancient Roman Republic, the aediles were officials elected from among the plebians and charged with caring for Rome's public infrastructure and ensuring an accurate system of weights and measures.
+
+The aim of the Aedile SDK is in the spirit of that ancient office:
+
+- Provide a fast and efficient service for interacting with Nostr relays via WebSocket connections.
+- Offer stable, well-tested implementations of commonly-used [Nostr Implementation Possibilities (NIPs)](https://github.com/nostr-protocol/nips/tree/master).
+- Open up Nostr development by taking care of the basics so developers can focus on solving problems, rather than reimplementing the protocol.
 
 ## Building the SDK
 
@@ -9,19 +19,20 @@ C++ System Development Kit for Nostr
 This project uses CMake as its build system, and vcpkg as its dependency manager.  Thus, to build the SDK, you will need the following:
 
 - CMake 3.19 or later
-- C++17 compiler
+- A C++17 compiler
 - vcpkg
 
+CMake invokes vcpkg at the start of the configure process to install some of the project's dependencies.  For this step to succeed, ensure that the `VCPKG_ROOT` environment variable is set to the path of your vcpkg installation.
+
 ### Building and Testing
 
-The SDK aims to support Linux, Windows, and macOS build targets.  CMake presets are provided for each target.
+The SDK aims to support Linux, Windows, and macOS build targets.  It currently supplies a CMake preset for Linux.
 
 #### Linux
 
 To build the SDK on Linux, run the following commands from the project root:
 
 ```bash
-cmake --preset linux
 cmake --build --preset linux
 ```