Removed trailing white spaces

Removed trailing whitespaces with

```sh
for file in `grep -r " $" * | cut -d : -f 1 | sort | uniq | grep -v " "`; do sed -i 's/[ \t]*$//' $file; done
```

and some handwork.

scripts/dockerfiles/images/memcache/Dockerfile

@@ -13,7 +13,7 @@ RUN apt-get install -y memcached
 EXPOSE 11211
 
 # Default Memcached run command arguments
-# Change to limit memory when creating container in Tutum 
+# Change to limit memory when creating container in Tutum
 CMD ["-m", "64"]
 
 # Set the user to run Memcached daemon