added oneAgreementtest to agreement test documentation
### noAgreementsTest
*no-agreements.trig (there are no agreement triples, expect output to be blank)*
+
+### oneAgreementTest
+*one-agreement.trig (there is one agreement .. expect agreement in output)*
+
+<https://localhost:8443/won/resource/event/5669098069340991000#content> {
+ event:5669098069340991000
+ won:hasTextMessage "one" .
+}
+<https://localhost:8443/won/resource/event/557600936467257340#content> {
+ event:557600936467257340
+ won:hasTextMessage "two" ;
+ agr:proposes event:5669098069340991000 .
+}
+<https://localhost:8443/won/resource/event/ow321nn1va6clfidc4s0#content-1o90> {
+ event:ow321nn1va6clfidc4s0
+ won:hasTextMessage "Please go on." ;
+ agr:accepts event:557600936467257340 .
+}
