Refactoring: cursus -> curriculum frontend

I hope I didn't missed anything, this commit is following the previous
one in this branch

frontend/src/rest/curriculum.js

@@ -0,0 +1,41 @@
+/**
+ * curriculum API
+ */
+
+import { restGet, restPostn, restDelete, restPatch } from './restConsumer.js'
+
+/**
+ * Create a new curriculum (bundle of courses)
+ * @param courses	list of courses
+ */
+export async function createcurriculum(courses){
+	return restPost("/curriculum", {courses: courses} );
+}
+
+/**
+ * Delete the specified curriculum
+ */
+export async function deletecurriculum(id){
+	return restDelete("/curriculum/" + id);
+}
+
+/**
+ * Get informations on a particular curriculum
+ *
+ * @param id	identification of the curriculum
+ *
+ * @return list of courses 
+ */
+export async function getcurriculum(id){
+	return restGet("/curriculum/" + id);
+}
+
+/**
+ * Modify the courses of a curriculum
+ *
+ * @param id		the id of the curriculum
+ * @param courses	list of new courses 
+ */
+export async function altercurriculum(id, courses){
+	return restPatch("/curriculum/" + id, courses);
+}