Updating Compose documentation

- Split out commands into individual pages for maintainability
- Add full usage in commands pages for usability
- Updated description of the run command
- adding in Aanand's comment

Signed-off-by: Mary Anthony <mary@docker.com>

docs/reference/index.md

@@ -0,0 +1,29 @@
+<!--[metadata]>
++++
+title = "Compose CLI reference"
+description = "Compose CLI reference"
+keywords = ["fig, composition, compose, docker, orchestration, cli,  reference"]
+[menu.main]
+identifier = "smn_compose_cli"
+parent = "smn_compose_ref"	
++++
+<![end-metadata]-->
+
+## Compose CLI reference
+
+The following pages describe the usage information for the [docker-compose](/reference/docker-compose.md) subcommands. You can also see this information by running `docker-compose [SUBCOMMAND] --help` from the command line.
+
+* [build](/reference/reference/build.md)
+* [help](/reference/help.md)
+* [kill](/reference/kill.md)          
+* [ps](/reference/ps.md)
+* [restart](/reference/restart.md)
+* [run](/reference/run.md)
+* [start](/reference/start.md)
+* [up](/reference/up.md)
+* [logs](/reference/logs.md)
+* [port](/reference/port.md)
+* [pull](/reference/pull.md) 
+* [rm](/reference/rm.md)
+* [scale](/reference/scale.md)
+* [stop](/reference/stop.md)