add CHANGELOG.md for 1.0.0 release (#324)

CHANGELOG.md

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+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
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+# The ASF licenses this file to You under the Apache License, Version 2.0
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+
+# OpenWhisk Catalog
+
+## 1.0.0
+  + Remove Weather Company Data package. (#322)
+  + Enhance GitHub webhook introducing allowing usage for GitHub Enterprise. (#3
+
+## 0.11.0
+  + Port websocket package to nodejs:10 (#315)
+  + Fix and provide clarity on access token scopes needed (#314)
+  + invoke.swift and hello.promises also need provide-api-key (#311)
+  + Fix countdown sample action (#310)
+  + Remove non-wskdeploy based package installation scripts (#308)
+  + Use needle to replace request (#304)
+
+## 0.10.0-incubating
+  + First Apache release