Move repo structure to a separate document

Reduces the clutter in CONTRIBUTING.md.

CONTRIBUTING.md

@@ -10,61 +10,7 @@ Before submitting code changes, get familiarized with these documents:
 - [Core Concepts](https://github.com/openshift/openshift-ansible/blob/master/docs/core_concepts_guide.adoc)
 - [Best Practices Guide](https://github.com/openshift/openshift-ansible/blob/master/docs/best_practices_guide.adoc)
 - [Style Guide](https://github.com/openshift/openshift-ansible/blob/master/docs/style_guide.adoc)
-
-## Repository structure
-
-### Ansible
-
-```
-.
-├── inventory           Contains dynamic inventory scripts, and examples of
-│                       Ansible inventories.
-├── library             Contains Python modules used by the playbooks.
-├── playbooks           Contains Ansible playbooks targeting multiple use cases.
-└── roles               Contains Ansible roles, units of shared behavior among
-                        playbooks.
-```
-
-#### Ansible plugins
-
-These are plugins used in playbooks and roles:
-
-```
-.
-├── ansible-profile
-├── callback_plugins
-├── filter_plugins
-└── lookup_plugins
-```
-
-### Scripts
-
-```
-.
-├── bin                 [DEPRECATED] Contains the `bin/cluster` script, a
-│                       wrapper around the Ansible playbooks that ensures proper
-│                       configuration, and facilitates installing, updating,
-│                       destroying and configuring OpenShift clusters.
-│                       Note: this tool is kept in the repository for legacy
-│                       reasons and will be removed at some point.
-└── utils               Contains the `atomic-openshift-installer` command, an
-                        interactive CLI utility to install OpenShift across a
-                        set of hosts.
-```
-
-### Documentation
-
-```
-.
-└── docs                Contains documentation for this repository.
-```
-
-### Tests
-
-```
-.
-└── test                Contains tests.
-```
+- [Repository Structure](docs/repo_structure.md)
 
 ## Running tests
 

docs/repo_structure.md

@@ -0,0 +1,54 @@
+# Repository structure
+
+### Ansible
+
+```
+.
+├── inventory           Contains dynamic inventory scripts, and examples of
+│                       Ansible inventories.
+├── library             Contains Python modules used by the playbooks.
+├── playbooks           Contains Ansible playbooks targeting multiple use cases.
+└── roles               Contains Ansible roles, units of shared behavior among
+                        playbooks.
+```
+
+#### Ansible plugins
+
+These are plugins used in playbooks and roles:
+
+```
+.
+├── ansible-profile
+├── callback_plugins
+├── filter_plugins
+└── lookup_plugins
+```
+
+### Scripts
+
+```
+.
+├── bin                 [DEPRECATED] Contains the `bin/cluster` script, a
+│                       wrapper around the Ansible playbooks that ensures proper
+│                       configuration, and facilitates installing, updating,
+│                       destroying and configuring OpenShift clusters.
+│                       Note: this tool is kept in the repository for legacy
+│                       reasons and will be removed at some point.
+└── utils               Contains the `atomic-openshift-installer` command, an
+                        interactive CLI utility to install OpenShift across a
+                        set of hosts.
+```
+
+### Documentation
+
+```
+.
+└── docs                Contains documentation for this repository.
+```
+
+### Tests
+
+```
+.
+└── test                Contains tests.
+```