Add docs

README.md

@@ -1,3 +1,62 @@
 # validator-list
 
 XRP Ledger validator list generation tool
+
+## Table of contents
+
+* [Dependencies](#dependencies)
+  * [ripple-libpp submodule](#ripple-libpp-submodule)
+  * [Other dependencies](#other-dependencies)
+* [Build and run](#build-and-run)
+* [Guide](#guide)
+
+## Dependencies
+
+### ripple-libpp submodule
+
+This includes a git submodule to the ripple-libpp source code, which is not cloned by default. To get the ripple-libpp source, either clone this repository using
+```
+$ git clone --recursive <location>
+```
+or after cloning, run the following commands
+```
+$ git submodule update --init --recursive
+```
+
+### Other dependencies
+
+* C++14 or greater
+* [Boost](http://www.boost.org/)
+* [OpenSSL](https://www.openssl.org/)
+* [cmake](https://cmake.org)
+
+## Build and run
+
+For linux and other unix-like OSes, run the following commands:
+
+```
+$ cd ${YOUR_VALIDATOR_KEYS_TOOL_DIRECTORY}
+$ mkdir -p build/gcc.debug
+$ cd build/gcc.debug
+$ cmake ../..
+$ cmake --build .
+$ ./validator-lists
+```
+
+For 64-bit Windows, open a MSBuild Command Prompt for Visual Studio
+and run the following commands:
+
+```
+> cd %YOUR_VALIDATOR_KEYS_TOOL_DIRECTORY%
+> mkdir build
+> cd build
+> cmake -G"Visual Studio 14 2015 Win64" ..
+> cmake --build .
+> .\Debug\validator-lsit.exe
+```
+
+32-bit Windows builds are not officially supported.
+
+## Guide
+
+[Validator List Guide](doc/validator-list-guide.md)