Fatal error in git submodules

[freephile]

When using git to clone the SDU repository, we also issue a git submodule update --init to bring in extension dependencies. The problem is that the submodule URL for SDU is in the key-based format (in other words: 'git@github.com:'). This probably proves useful for automated Continuous Integration jobs from a host with the proper SSH key. However, it fails with a fatal error for anyone else.

The submodule URL should be publicly accessible, for example: using HTTPS://github.com/

[freephile]

This issue is solved by pull #12

[freephile]

fixed in pull #16