Prerequisites for building from sources:
    bash          [https://en.wikipedia.org/wiki/Bash_(Unix_shell)]
    mupdf         [http://mupdf.com/]
    opengl        [http://en.wikipedia.org/wiki/OpenGL]
    git           [https://git-scm.com/]
    ocaml (4.11)  [http://ocaml.org/]
        If not present will be downloaded from the network and
        built/used locally without system-wide installation.
        This requires either:
            wget    [https://www.gnu.org/software/wget/]
            or curl [https://curl.haxx.se/]

    asciidoctor   [https://asciidoctor.org/
                  in needed to build man pages

To download mupdf+prerequisites that llpp is known to work with:
    llpp% mkdir build && sh misc/getmupdf.sh build/mupdf

To build llpp (binary will be in build/llpp):
   llpp% bash build.bash build

To build man pages (will be in build/doc/[name].1)
   llpp% bash build.bash build doc
