DAO classes were added
Changes to be committed:
	new file:   school-dao/src/main/java/school/dao/CourseRequestDao.java
	new file:   school-dao/src/main/java/school/dao/StudentDao.java
	new file:   school-dao/src/main/java/school/dao/session/implementation/CourseRequestDaoImpl.java
	new file:   school-dao/src/main/java/school/dao/session/implementation/StudentDaoImpl.java