typo in readme & Makefile (#125)

* typo

* typo in Makefile
diff --git a/docker-compose/Makefile b/docker-compose/Makefile
index 25c80fe..edb55d6 100644
--- a/docker-compose/Makefile
+++ b/docker-compose/Makefile
@@ -296,7 +296,7 @@
 
 	echo "$$(tput setaf 4)invoking the function ...$$(tput sgr0)"
 	res=`$(WSK_CLI) -i action invoke hello --blocking --result` \
-	    && echo "invokation result:" $$res \
+	    && echo "invocation result:" $$res \
 	    && (echo $$res | grep "Hello, World") || ($(WSK_CLI) -i action delete hello && tail -n 200 ~/tmp/openwhisk/invoker/logs/invoker-local_logs.log ~/tmp/openwhisk/controller/logs/controller-local_logs.log && exit 1)
 
 	echo "$$(tput setaf 4) creating an API from the hello function ...$$(tput sgr0)"
diff --git a/docker-compose/README.md b/docker-compose/README.md
index 6ca4866..6b7a179 100644
--- a/docker-compose/README.md
+++ b/docker-compose/README.md
@@ -136,7 +136,7 @@
     return {payload: "Hello, " + name + "!"};
 }
 ```
-The result of the invokation should be printed on the terminal:
+The result of the invocation should be printed on the terminal:
 ```
 {
     "payload": "Hello, World!"