remake validation in registration page, fix bugs in change password
remake registration.jsp,add javadoc in RoleDao, CategoryDao
fix bugs
Merge branch 'master' into roma

Conflicts:
	SSEL/src/main/java/com/softserve/dao/CategoryDao.java
	SSEL/src/main/java/com/softserve/dao/impl/CategoryDaoImpl.java
fix bugs, delete files app_log