The PR fixed problems related to MrDocs:

• CMakeLists.txt supports being used as the root script. Mrdocs calls cmakelists.txt as the root build script instead of the boost superproject script. When the build script is in the CMake root source directory, we need to include the Boost targets so that the include paths are found. Otherwise, you'll get compilation errors because of missing headers. In root mode, you'll get:
  • a BOOST_SRC_DIR option that can be used to set the directory with other boost libraries (the default being ../..)
  • Some logic to check if this boost source dir is valid
  • And logic to include this boost dir as a subproject, only including the dynamicbitset dependencies and excluding dynamicbitset itself.
• The mrdocs config is set to multipage because:
  • The single page is immense. No human can read that.
  • Even loading it was taking too long.
  • Also, the Antora extension only supports multipage for now (IIRC), so any tests with single pages aren't going to be used.
  • The recursive index page is looking pretty good for this library

Feel free to change anything you don't like and treat anything here as just a suggestion.