Fixup init to build CaSILE

[alerque]

CaSILE used on the system doesn't need initializing, but used as a submodule we need to trigger the automake system.

Re-purpose the make init rule in rules to check that CaSILE is in a usable condition, and build if necessary (bootstrap, configure, make).

This kind of init can probably default to production mode to avoid all the node module dependencies that are development related.

[alerque]

This needs to be smart enough not to build the CLI when used from a system installed invocation.

[alerque]

What was once make init is now casile setup, but there are still some issues related to project specific init (see also #88) that need to get worked out.

[alerque]

Use as a submodule is no longer supported, this issues is now irrelevant. The CLI is way more versatile and there are also better ways to address the versioning (e.g. containers).