Update clone command, fail cloning of path deps

[micprog]

Fixes #208

[fischeti]

I tried it out on an example that is similar to what is described in #208. However, I get the following behaviour:

1. bender clone A still works, and it does not update the path of B in Bender.lock i.e. it still points to the one in .bender. Which I think is fine.
2. bender clone B throws an error, but not the new one I would expect i.e. I get a fatal: '".bender/path/to/path_dep"' does not appear to be a git repository

Shouldn't the second case throw the new errorDependency is not a git dependency, cannot clone.?

[micprog]

I tried it out on an example that is similar to what is described in #208. However, I get the following behaviour:

1. `bender clone A` still works, and it does not update the path of `B` in Bender.lock i.e. it still points to the one in `.bender`. Which I think is fine.

2. `bender clone B` throws an error, but not the new one I would expect i.e. I get a `fatal: '".bender/path/to/path_dep"' does not appear to be a git repository`

Shouldn't the second case throw the new errorDependency is not a git dependency, cannot clone.?

I updated the implementation to properly handle 1., i.e., also redirecting the dependency path for path dependencies in git dependencies.

I was not able to reproduce 2.

[fischeti]

I retried and both scenarios now do what they are meant to do👍