Course add and removal
Changes to be committed:
	modified:   school-dao/src/main/java/school/dao/CourseDao.java
	modified:   school-dao/src/main/java/school/dao/implementation/CourseDaoImpl.java
	modified:   school-dao/src/main/java/school/model/Course.java
	modified:   school-service/src/main/java/school/service/CourseService.java
	modified:   school-service/src/main/java/school/service/implementation/CourseRequestServiceImpl.java
	modified:   school-service/src/main/java/school/service/implementation/CourseServiceImpl.java
	modified:   school-web/src/main/java/school/controller/CourseController.java
	modified:   school-web/src/main/webapp/resources/css/course.css
	modified:   school-web/src/main/webapp/resources/js/course-request.js
	modified:   school-web/src/main/webapp/resources/js/course.js
	new file:   school-web/src/main/webapp/views/courses/headteacher.jsp