Changelog structure (#916)

* bring structure to changelog

* markdownlint

.github/PULL_REQUEST_TEMPLATE.md

@@ -2,7 +2,8 @@ Fixes #.
 
 ## Changes
 
-Please provide a brief description of the changes here.
+Please provide a brief description of the changes here. Update the
+`CHANGELOG.md` for non-trivial changes.
 
 For significant contributions please make sure you have completed the following items:
 

CHANGELOG.md

@@ -1,21 +0,0 @@
-# Changelog
-
-Please update changelog as part of any significant pull request. Place short
-description of your change into "Unreleased" section. As part of release
-process content of "Unreleased" section content will generate release notes for
-the release.
-
-## Unreleased
-
-* Modified Prometheus Exporter to add listening on all hostnames support.
-    1. Modified the content of PrometheusExporterOptions from `Uri()` to
-       `string`.
-    2. `HttpListener()` can support "+" as: hostname which listens on all
-       ports.
-    3. Modified `examples/Console/TestPrometheusExporter.cs` to safely use the
-       new implementation.
-    4. Jaeger exporter implemented
-
-* Copy from
-  [OpenCensus](http://github.com/census-instrumentation/opencensus-csharp) at
-  commit #`0474607a16282252697f989113d68bdf71959070`.

src/OpenTelemetry.Api/CHANGELOG.md

@@ -0,0 +1,9 @@
+# Changelog
+
+## Unreleased
+
+## 0.3.0-beta
+
+Released 2020-07-23
+
+* Initial release

src/OpenTelemetry.Exporter.Console/CHANGELOG.md

@@ -0,0 +1,9 @@
+# Changelog
+
+## Unreleased
+
+## 0.3.0-beta
+
+Released 2020-07-23
+
+* Initial release

src/OpenTelemetry.Exporter.Jaeger/CHANGELOG.md

@@ -0,0 +1,9 @@
+# Changelog
+
+## Unreleased
+
+## 0.3.0-beta
+
+Released 2020-07-23
+
+* Initial release

src/OpenTelemetry.Exporter.OpenTelemetryProtocol/CHANGELOG.md

@@ -0,0 +1,9 @@
+# Changelog
+
+## Unreleased
+
+## 0.3.0-beta
+
+Released 2020-07-23
+
+* Initial release

src/OpenTelemetry.Exporter.Prometheus/CHANGELOG.md

@@ -0,0 +1,9 @@
+# Changelog
+
+## Unreleased
+
+## 0.3.0-beta
+
+Released 2020-07-23
+
+* Initial release

src/OpenTelemetry.Exporter.ZPages/CHANGELOG.md

@@ -0,0 +1,9 @@
+# Changelog
+
+## Unreleased
+
+## 0.3.0-beta
+
+Released 2020-07-23
+
+* Initial release

src/OpenTelemetry.Exporter.Zipkin/CHANGELOG.md

@@ -0,0 +1,9 @@
+# Changelog
+
+## Unreleased
+
+## 0.3.0-beta
+
+Released 2020-07-23
+
+* Initial release

src/OpenTelemetry.Extensions.Hosting/CHANGELOG.md

@@ -0,0 +1,9 @@
+# Changelog
+
+## Unreleased
+
+## 0.3.0-beta
+
+Released 2020-07-23
+
+* Initial release

src/OpenTelemetry.Instrumentation.AspNet/CHANGELOG.md

@@ -0,0 +1,9 @@
+# Changelog
+
+## Unreleased
+
+## 0.3.0-beta
+
+Released 2020-07-23
+
+* Initial release

src/OpenTelemetry.Instrumentation.AspNetCore/CHANGELOG.md

@@ -0,0 +1,9 @@
+# Changelog
+
+## Unreleased
+
+## 0.3.0-beta
+
+Released 2020-07-23
+
+* Initial release

src/OpenTelemetry.Instrumentation.Grpc/CHANGELOG.md

@@ -0,0 +1,9 @@
+# Changelog
+
+## Unreleased
+
+## 0.3.0-beta
+
+Released 2020-07-23
+
+* Initial release

src/OpenTelemetry.Instrumentation.Http/CHANGELOG.md

@@ -0,0 +1,9 @@
+# Changelog
+
+## Unreleased
+
+## 0.3.0-beta
+
+Released 2020-07-23
+
+* Initial release

src/OpenTelemetry.Instrumentation.SqlClient/CHANGELOG.md

@@ -0,0 +1,9 @@
+# Changelog
+
+## Unreleased
+
+## 0.3.0-beta
+
+Released 2020-07-23
+
+* Initial release

src/OpenTelemetry.Instrumentation.StackExchangeRedis/CHANGELOG.md

@@ -0,0 +1,9 @@
+# Changelog
+
+## Unreleased
+
+## 0.3.0-beta
+
+Released 2020-07-23
+
+* Initial release

src/OpenTelemetry.Shims.OpenTracing/CHANGELOG.md

@@ -0,0 +1,9 @@
+# Changelog
+
+## Unreleased
+
+## 0.3.0-beta
+
+Released 2020-07-23
+
+* Initial release

src/OpenTelemetry/CHANGELOG.md

@@ -0,0 +1,9 @@
+# Changelog
+
+## Unreleased
+
+## 0.3.0-beta
+
+Released 2020-07-23
+
+* Initial release