Release 1.0.0 release note (#217)

docs/release-notes/release-notes.1.0.0.md

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+# vspd 1.0.0
+
+This is the initial release of vspd which is intended to replace
+[dcrstakepool](https://github.com/decred/dcrstakepool) as the reference
+implementation of a Decred Voting Service Provider.
+
+The [Decred blog](https://blog.decred.org/2020/06/02/A-More-Private-Way-to-Stake/)
+explains the motivation for creating vspd to replace dcrstakepool.
+
+## Dependencies
+
+vspd 1.0.0 requires:
+
+- dcrd 1.6.0
+- dcrwallet 1.6.0
+
+When deploying vspd to production, always use release versions of all binaries.
+Neither vspd nor its dependencies should be built from master when handling
+mainnet tickets.
+
+## New features
+
+The key features offered by this initial version are:
+
+- HTTP API
+  - Endpoints to allows VSP users to register their tickets with the VSP, and to
+    check on the status of registered tickets.
+  - A status endpoint allows VSP operators to remotely monitor vspd.
+
+- Web front-end
+  - A public home page displays various VSP statistics.
+  - A hidden admin page allows VSP operators to search for registered tickets
+    and download database backups.
+
+Please review the [project README](https://github.com/decred/vspd) for extended
+documentation, including how to use the API and a detailed deployment guide.