Added development structure, reversed order to release features (gazebosim#282)

* Added development structure, reversed order to release features

Signed-off-by: Nate Koenig <[email protected]>

* remove whitespace

Signed-off-by: Nate Koenig <[email protected]>

* reorder

Signed-off-by: Nate Koenig <[email protected]>

Signed-off-by: Nate Koenig <[email protected]>
Co-authored-by: Nate Koenig <[email protected]>

Author: nkoenig

development.md

@@ -0,0 +1,8 @@
+# Gazebo Development
+
+The following guides describe how Gazebo is developed, maintained, and
+released.
+
+* [Continuous Integration](ci)
+* [Contributing](contributing)
+* [Release process](release)

index.yaml

@@ -31,25 +31,27 @@ pages:
     title: Releases
     file: releases.md
     description: Past, current, and future release information.
-  - name: contributing
-    title: Contributing
-    file: contributing.md
-    description: How to contribute to Gazebo.
+  - name: development 
+    title: Development
+    file: development.md
+    description: Gazebo development information
+    children:
+      - name: contributing
+        title: Contributing
+        file: contributing.md
+        description: How to contribute to Gazebo.
+      - name: ci
+        title: Continuous Integration
+        file: ci.md
+        description: Continuous Integration overview.
+      - name: release
+        title: Release process
+        file: release.md
+        description: Release process overview.
   - name: architecture
-    title: Architecture
+    title: Sim Architecture
     file: architecture.md
     description: Gazebo Sim's architecture overview.
-    unlisted: true
-  - name: release
-    title: Release process
-    file: release.md
-    description: Release process overview.
-    unlisted: true
-  - name: ci
-    title: Continuous Integration
-    file: ci.md
-    description: Continuous Integration overview.
-    unlisted: true
 releases:
   - name: garden
     lts: false

release.md

@@ -94,7 +94,7 @@ stability of the software:
      (see [the homebrew-simulation issue](https://github.com/osrf/homebrew-simulation/issues/1314)
      for more information).
 
-### Using the `gzdev repository` command
+### Using the gzdev repository command
 
 The [gzdev repository](https://github.com/gazebo-tooling/gzdev#repository)
 command is a convenient way to configure Ubuntu / Debian systems to use a