Little wrong with readme.md

[wzqvip]

git clone --recursive -j8 git://github.com/hjwdzh/Manifold
cd Manifold
mkdir build
cd build
cmake .. -DCMAKE_BUILD_TYPE=Release
make

Here should be
git clone --recursive -j8 https://github.com/hjwdzh/Manifold.git cd Manifold mkdir build cd build cmake .. -D CMAKE_BUILD_TYPE=Release

Maybe missing a space.
And for some reason, I can use
git clone --recursive -j8 https://github.com/hjwdzh/Manifold.git Cloning into 'Manifold'... remote: Enumerating objects: 2121, done. remote: Total 2121 (delta 0), reused 0 (delta 0), pack-reused 2121 Receiving objects: 100% (2121/2121), 4.45 MiB | 5.57 MiB/s, done. Resolving deltas: 100% (521/521), done.

but this will fail:
git clone --recursive -j8 git://github.com/hjwdzh/Manifold.git Cloning into 'Manifold'... fatal: unable to connect to github.com: github.com[0: 20.205.243.166]: errno=Unknown error