Update example in overview section

README.md

@@ -51,14 +51,17 @@ To illustrate, define a couple of HTTP resources, a cache, and a log file:
 $ url1=http://md.incommon.org/InCommon/InCommon-metadata-preview.xml
 $ url2=http://md.incommon.org/InCommon/InCommon-metadata-fallback.xml
 $ export CACHE_DIR=/tmp/http_cache
-$ export LOG_FILE=$CACHE_DIR/cget_log.txt
-$ touch $LOG_FILE
+$ export LOG_FILE=/dev/tty
 ```
 
 GET the first resource:
 
 ```Shell
 $ $BIN_DIR/cget.sh $url1 > /dev/null
+2017-05-02T13:24:57Z INFO cget.sh requesting resource: http://md.incommon.org/InCommon/InCommon-metadata-preview.xml
+2017-05-02T13:26:11Z INFO conditional_get received response code: 200
+2017-05-02T13:26:11Z INFO conditional_get writing cached content file: /tmp/http_cache/1e6b844a49d1850b82feded72cf83ed7_content
+2017-05-02T13:26:12Z INFO conditional_get reading cached content file: /tmp/http_cache/1e6b844a49d1850b82feded72cf83ed7_content
 $ echo $?
 0
 $ ls -1 $CACHE_DIR
@@ -74,19 +77,15 @@ ETag: "299866f-54e0286fb789a"
 Accept-Ranges: bytes
 Content-Length: 43615855
 Content-Type: application/samlmetadata+xml
-
-$ cat $CACHE_DIR/cget_log.txt
-2017-04-26T16:29:44Z INFO cget.sh requesting resource: http://md.incommon.org/InCommon/InCommon-metadata-preview.xml
-2017-04-26T16:30:09Z INFO conditional_get received response code: 200
-2017-04-26T16:30:10Z INFO conditional_get writing cached content file: /tmp/http_cache/1e6b844a49d1850b82feded72cf83ed7_content
-2017-04-26T16:30:10Z INFO conditional_get reading cached content file: /tmp/http_cache/1e6b844a49d1850b82feded72cf83ed7_content
 ```
 
 Assuming the resource doesn't change on the server, subsequent requests will return the cached resource. To bypass the network altogether, use the ``-C`` option:
 
 ```Shell
 $ $BIN_DIR/cget.sh -C $url1 | wc -c
- 43615855
+2017-05-02T13:27:07Z INFO cget.sh requesting resource: http://md.incommon.org/InCommon/InCommon-metadata-preview.xml
+2017-05-02T13:27:07Z INFO conditional_get reading cached content file: /tmp/http_cache/1e6b844a49d1850b82feded72cf83ed7_content
+ 43765172
 ```
 
 Of course the ``-C`` option will fail if the resource is not cached: