added README's to img and runc

Signed-off-by: Ian Henry <ihenry@chef.io>

img/README.md

@@ -0,0 +1,14 @@
+# Img
+The `img` plan _only_ provides users access to the standalone [img binary](https://github.com/genuinetools/img). IMG unlike docker does not include a running daemon. Instead, it is meant to be executed as a binary for the creation of unprivilied OCI and Docker container images
+
+## Examples
+To use the `img` binary you can follow two different patterns. You can either binlink the package to the underlying system, or you can use the `hab` binary to execute the `img` binary
+
+```
+$ hab pkg exec core/img img --help
+```
+Or
+```
+$ hab pkg binlink core/img img
+$ img --help
+```

runc/README.md

@@ -0,0 +1,14 @@
+# Runc
+The `runc` plan _only_ provides users access to the standalone [runc binary](https://github.com/opencontainers/runc). Runc unlike dockerd does not include a running daemon. Instead, it is meant to be executed as a binary or consumed as a library to manage OCI bundle containers.
+
+## Examples
+To use the `runc` binary you can follow two different patterns. You can either binlink the package to the underlying system, or you can use the `hab` binary to execute the `img` binary
+
+```
+$ hab pkg exec core/runc runc --help
+```
+Or
+```
+$ hab pkg binlink core/runc runc
+$ runc --help
+```