add changelog (#1071)

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+<!--
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
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+#     http://www.apache.org/licenses/LICENSE-2.0
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+-->
+
+# Apache OpenWhisk WskDeploy
+
+## 1.0.0
+  * Auto supply a dummy API GW token (#1068)
+  * Support Description field in corresponding entities (#1057)
+  * Honor WSK_CONFIG_FILE if variable is set (#1054)
+  * Update version of whisk modules (#1067)
+  * Update openwhisk-client-go version (#1059); Fixes #1050.
+  * Fixes export project with feed bug (#1052)
+  * Added date and commit SHA to the version command (#1047)
+  * Account for variability in Account Limits from various provider impls. (#1048)
+
+## 0.10.0-incubating
+  * Fix language:default runtime setting (#1039)
+  * Link api schema to specification overview page (#1030)
+  * Add API entity schema (#1029)
+  * Only print info messages when the verbose flag is enabled (#1027)
+  * Enable programatic support for additional request headers (#1023)
+  * Add swift 4.2 (#1022)
+  * Add PHP 7.3 runtime (#1021)
+  * Add support for .Net dotnet:2.2 action kind (#1019)
+  * Add fallback method to find wskprops when go-client fails (#1015)
+  * Add ruby to specifications file (#1012)
+  * Add nodejs:10 kind for wskdeploy (#1011)
+  * Add support to parse the type slice (#1010)
+  * Add pkg and action version number with interpolation (#1009)
+  * Enable export verbose output (#996)
+  * Add go-runtime (#1006)
+  * Upgrade the Go version to 1.9 (#997)
+  * Introducing include and exclude in zip action (#991)
+  * Add ruby runtime (#983)
+  * Skipping response data in case of http request was successful (#981)
+  * Bug fix. Export shouldn't fail when ApiGW missing (#979)
+  * Added HTTP response documentation (#976)
+  * Fixed apigateway docs and example manifests (#974)
+
+## 0.9.8-incubating
+  Initial Apache Release