Fixes for external stack deployment (#851)

Fixes
- stack path resolution for `build`
- external stack path resolution for deployments
- "extra" config detection
- `deployment ports` command
- `version` command in dist or source install (without build_tag.txt)
- `setup-repos`, so it won't die when an existing repo is not at a branch or exact tag

Used in cerc-io/fixturenet-eth-stacks#14

Reviewed-on: cerc-io/stack-orchestrator#851
Reviewed-by: David Boreham <dboreham@noreply.git.vdb.to>

setup.py

@@ -4,9 +4,11 @@ with open("README.md", "r", encoding="utf-8") as fh:
     long_description = fh.read()
 with open("requirements.txt", "r", encoding="utf-8") as fh:
     requirements = fh.read()
+with open("stack_orchestrator/data/version.txt", "r", encoding="utf-8") as fh:
+    version = fh.readlines()[-1].strip(" \n")
 setup(
     name='laconic-stack-orchestrator',
-    version='1.0.12',
+    version=version,
     author='Cerc',
     author_email='info@cerc.io',
     license='GNU Affero General Public License',