Breaking out README

Adding new material
Adding in template chomped in error
Cover install/deploy in README
Adding in Stephen's comments
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Updating with commentary from pr
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Signed-off-by: Mary Anthony <mary@docker.com>

docs/storage-drivers/azure.md

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+# Microsoft Azure storage driver
+
+
+An implementation of the `storagedriver.StorageDriver` interface which uses [Microsoft Azure Blob Storage][azure-blob-storage] for object storage.
+
+## Parameters
+
+The following parameters must be used to authenticate and configure the storage driver (case-sensitive):
+
+* `accountname`: Name of the Azure Storage Account.
+* `accountkey`: Primary or Secondary Key for the Storage Account.
+* `container`: Name of the root storage container in which all registry data will be stored. Must comply the storage container name [requirements][create-container-api].
+* `realm`: (optional) Domain name suffix for the Storage Service API endpoint. Defaults to `core.windows.net`. For example realm for "Azure in China" would be `core.chinacloudapi.cn` and realm for "Azure Government" would be `core.usgovcloudapi.net`.
+
+
+[azure-blob-storage]: http://azure.microsoft.com/en-us/services/storage/
+[create-container-api]: https://msdn.microsoft.com/en-us/library/azure/dd179468.aspx

docs/storage-drivers/filesystem.md

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+# Filesystem storage driver
+
+An implementation of the `storagedriver.StorageDriver` interface which uses the local filesystem.
+
+## Parameters
+
+`rootdirectory`: (optional) The root directory tree in which all registry files will be stored. Defaults to `/tmp/registry/storage`.

docs/storage-drivers/inmemory.md

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+# In-memory storage driver
+
+An implementation of the `storagedriver.StorageDriver` interface which uses local memory for object storage.
+
+**IMPORTANT**: This storage driver *does not* persist data across runs, and primarily exists for testing.
+
+## Parameters
+
+None

docs/storage-drivers/s3.md

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+# S3 storage driver
+
+An implementation of the `storagedriver.StorageDriver` interface which uses Amazon S3 for object storage.
+
+## Parameters
+
+`accesskey`: Your aws access key.
+
+`secretkey`: Your aws secret key.
+
+**Note** You can provide empty strings for your access and secret keys if you plan on running the driver on an ec2 instance and will handle authentication with the instance's credentials.
+
+`region`: The name of the aws region in which you would like to store objects (for example `us-east-1`). For a list of regions, you can look at http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.html
+
+`bucket`: The name of your s3 bucket where you wish to store objects (needs to already be created prior to driver initialization).
+
+`encrypt`: (optional) Whether you would like your data encrypted on the server side (defaults to false if not specified).
+
+`secure`: (optional) Whether you would like to transfer data to the bucket over ssl or not. Defaults to true (meaning transfering over ssl) if not specified. Note that while setting this to false will improve performance, it is not recommended due to security concerns.
+
+`v4auth`: (optional) Whether you would like to use aws signature version 4 with your requests. This defaults to true if not specified (note that the eu-central-1 region does not work with version 2 signatures, so the driver will error out if initialized with this region and v4auth set to false)
+
+`chunksize`: (optional) The default part size for multipart uploads (performed by WriteStream) to s3. The default is 10 MB. Keep in mind that the minimum part size for s3 is 5MB. You might experience better performance for larger chunk sizes depending on the speed of your connection to s3.
+
+`rootdirectory`: (optional) The root directory tree in which all registry files will be stored. Defaults to the empty string (bucket root).