Implementation was added for Student, CourseRequest
Changes to be committed:
	modified:   school-dao/src/main/java/school/dao/CourseRequestDao.java
	modified:   school-dao/src/main/java/school/dao/session/implementation/CourseRequestDaoImpl.java
	modified:   school-dao/src/main/java/school/dao/session/implementation/StudentDaoImpl.java
	modified:   school-model/src/main/java/school/model/CourseRequest.java
	modified:   school-model/src/main/java/school/model/Student.java