installation guide wrong git clone cmd / permission problems

[srochel]

Hi - I tried to follow the installation guide.
Issues:

1. https://github.com/dmlc/tvm/blob/master/docs/how_to/install.md
   git clone --recursive ssh://git@github.com/dmlc/tvm did not work with my credentials, should be:
   git clone --recursive https://github.com/dmlc/tvm.git

2. git clone recursively failed, see below. I was able to clone manually:
   git clone https://github.com/dmlc/HalideIR.git

Failure mode:
git clone --recursive https://github.com/dmlc/tvm.git
Cloning into 'tvm'...
remote: Counting objects: 5714, done.
remote: Compressing objects: 100% (4/4), done.
remote: Total 5714 (delta 0), reused 0 (delta 0), pack-reused 5710
Receiving objects: 100% (5714/5714), 1.47 MiB | 860.00 KiB/s, done.
Resolving deltas: 100% (3847/3847), done.
Submodule 'HalideIR' (ssh://git@github.com/dmlc/HalideIR) registered for path 'HalideIR'
Submodule 'dlpack' (https://github.com/dmlc/dlpack) registered for path 'dlpack'
Submodule 'dmlc-core' (https://github.com/dmlc/dmlc-core) registered for path 'dmlc-core'
Cloning into '/Users/steroche/Documents/Projects/TVM/tvm/HalideIR'...
Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
fatal: clone of 'ssh://git@github.com/dmlc/HalideIR' into submodule path '/Users/steroche/Documents/Projects/TVM/tvm/HalideIR' failed
Failed to clone 'HalideIR'. Retry scheduled
Cloning into '/Users/steroche/Documents/Projects/TVM/tvm/dlpack'...
Cloning into '/Users/steroche/Documents/Projects/TVM/tvm/dmlc-core'...
Cloning into '/Users/steroche/Documents/Projects/TVM/tvm/HalideIR'...
Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
fatal: clone of 'ssh://git@github.com/dmlc/HalideIR' into submodule path '/Users/steroche/Documents/Projects/TVM/tvm/HalideIR' failed
Failed to clone 'HalideIR' a second time, aborting

[tqchen]

The installation guide said (note the clone mode in ssh instead of https)

git clone --recursive ssh://git@github.com/dmlc/tvm

[tqchen]

We will be able to use https once the things get opensourced