Add Gerrit User Summit USA 2019 post

The Gerrit User Summit 2019 has now two dates and locations:
- Summer 2019 (Gothenburg - Sweden)
- Autumn 2019 (Sunnyvale - California)

Advertise the new dates to the home page and gives the basic
information needed for the people to sign-up to the event.

Change-Id: I348dd26b495c8ea47aecd923f1c56c6a67ed5af0
diff --git a/_posts/2019-06-18-user-summit-sunnyvale-registration-open.md b/_posts/2019-06-18-user-summit-sunnyvale-registration-open.md
new file mode 100644
index 0000000..eac59a1
--- /dev/null
+++ b/_posts/2019-06-18-user-summit-sunnyvale-registration-open.md
@@ -0,0 +1,32 @@
+---
+title: Gerrit User Summit USA 2019 Registration is Open
+tags: news summit hackathon
+keywords: news summit hackathon
+permalink: 2019-06-18-user-summit-sunnyvale-registration-open.html
+summary: "Registration for the Gerrit User Summit 2019 USA is now open"
+hide_sidebar: true
+hide_navtoggle: true
+toc: true
+---
+
+Registration for Gerrit User Summit USA 2019 is now open on
+[gus2019.eventbrite.com](https://gus2019.eventbrite.com).
+
+This year the Gerrit User Summit doubles and will offer two locations and dates:
+
+- Gerrit User Summit Europe - 29/30 August - Gothenburg (Sweden)
+- Gerrit User Summit USA - 16/17 November - Sunnyvale (CA)
+
+You can choose to participate in any of them, depending on your local logistics
+and availability. The two events have roughly the same schedule, with some
+slight variation of schedule for the Gerrit User's stories and talks.
+
+When you sign-up to the summit of your choice, you can also request participation
+in the form. If you are a maintainer, your request is automatically accepted.
+
+This year, the **Hackathon is open to all contributors that are willing to learn**
+how to help the community and even start coding with Gerrit and its API.
+
+> Please note that the **seats for the Hackathon are limited** and your request
+> could be declined by the organizer. We will do our best, however, to get people in
+> and help increasing the community of contributors.
\ No newline at end of file