topic validator
remake validation in registration page, fix bugs in change password
modifications on spring validation
fix StudentCabinetServiceImp
Merge remote-tracking branch 'origin' into anatoliy
replace session, fix topic view
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
cosmetic changes
Merge branch 'master' of https://github.com/nromanen/Ch-025 into hash

Conflicts:
	SSEL/.classpath
merge branch
Merge branch 'master' of https://github.com/nromanen/Ch-025 into shutka