Add the exemptions gestion and improve the navigation between requests

frontend/src/rest/requests.js

@@ -66,4 +66,12 @@ export async function editChangeCurrReq(id, newState){
 
 export async function editChangeCurrReqTeacherState(id, newState){
     return restPatch("/changecurriculumreqteacher/"+id+"/"+newState)
+}
+
+export async function getExempReq(id){
+    return restGet("/exemptionsreq/"+id)
+}
+
+export async function editExempReqState(id, newstate){
+    return restPatch("/exemptionsreq/"+id+"/"+newstate)
 }