Fixes Issue #471 with Publish

- Add sed to Dockerfile; this sed exists on publish script; breaks headings/nav in files without metadata
- Ensure sed runs over storage-driver/ subdir
- Add metadata to all the files (including specs) that don't have it; this ensures they display correctly on publish
- Implement the fix for the showing up in Github
- Update template with GITHUB IGNORES

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

docs/storage-drivers/azure.md

@@ -1,5 +1,10 @@
-# Microsoft Azure storage driver
+<!--GITHUB
+page_title: Microsoft Azure storage driver
+page_description: Explains how to use the Azure storage drivers
+page_keywords: registry, service, driver, images, storage, azure
+IGNORES-->
 
+# Microsoft Azure storage driver
 
 An implementation of the `storagedriver.StorageDriver` interface which uses [Microsoft Azure Blob Storage][azure-blob-storage] for object storage.
 

docs/storage-drivers/filesystem.md

@@ -1,3 +1,9 @@
+<!--GITHUB
+page_title: Filesystem storage driver
+page_description: Explains how to use the filesystem storage drivers
+page_keywords: registry, service, driver, images, storage, filesystem
+IGNORES-->
+
 # Filesystem storage driver
 
 An implementation of the `storagedriver.StorageDriver` interface which uses the local filesystem.

docs/storage-drivers/inmemory.md

@@ -1,3 +1,9 @@
+<!--GITHUB
+page_title: In-memory storage driver
+page_description: Explains how to use the in-memory storage drivers
+page_keywords: registry, service, driver, images, storage, in-memory
+IGNORES-->
+
 # In-memory storage driver
 
 An implementation of the `storagedriver.StorageDriver` interface which uses local memory for object storage.

docs/storage-drivers/s3.md

@@ -1,3 +1,9 @@
+<!--GITHUB
+page_title: S3 storage driver
+page_description: Explains how to use the S3 storage drivers
+page_keywords: registry, service, driver, images, storage, S3
+IGNORES-->
+
 # S3 storage driver
 
 An implementation of the `storagedriver.StorageDriver` interface which uses Amazon S3 for object storage.