Regisztráció félig kész

Modified   src/main/java/hu/woomler/gastrobees/entity/User.java
Modified   src/main/java/hu/woomler/gastrobees/web/GastroApplication.java
Modified   src/main/java/hu/woomler/gastrobees/web/LoginPage.html
Modified   src/main/java/hu/woomler/gastrobees/web/LoginPage.java
Modified   src/main/resources/hu/woomler/gastrobees/web/GastroApplication.properties
Add        src/main/java/hu/woomler/gastrobees/service/UserService.java
Add        src/main/java/hu/woomler/gastrobees/service/UserServiceImpl.java