Ajout README.

README.md

+# iipimage-benchtest
+
+## Requirements
+
+ * [Siege] (https://github.com/JoeDog/siege) - Debian package available.
+
+## Usage
+
+```
+$ chmod u+x doit.sh
+$ ./doit.sh -c <nb clients> -r <nb runs> -t <nb tests> -u <url dataset size> -endpoint <image url>
+```
+
+Example :
+
+```
+$ ./doit.sh -c 10 -r 20 -t 5 -u 500 -endpoint https://localhost/fcgi-bin/iipsrv.fcgi?IIIF=/img.tif/
+```
+
+Help :
+
+```
+$ ./doit.sh -h
+```
+
+## Outputs
+
+Output files are stored is the iipimage-benchtest directory : out-<test-number>.txt.