This commit adds for the user the possibility to define an hour for the daily notification emails, also he might receive hourly new notifications.

Classes:
- ProfileController.java: Add code for defining hour for daily notifications
- Secured.java: Modify methods isFriend() and isOwnerOfAccount() to be JPA transactional
- EmailNotifications.java: Add HOURLY to enumeration
- EmailService.java: Update JavaDoc and method name of sendDailyHourlyNotificationsEmails()
- Account.java: Add integer attribute dailyEmailNotificationHour
- Friendship.java: Remove throws from method signature of alreadyFriendlyTransactional(), update findFriends() to be JPA transactional
- NewNotification.java: Update JavaDoc, method naming and JPA Query of findUsersWithDailyHourlyEmailNotifications() to either find new notifications for users who wants to receive their emails hourly, or daily, if the current hour is equal their desired receiving hour
- Global.java: Update Akka scheduler for sending of hourly/daily mails, implement method  getNextHour() to find the next full hour of current time

Templates:
- Profile/edit.scala.html: Changed select box to be radio boxes, to add a number input for desired hour for daily email notifications

Other:
- messages: Update and add i18n for daily/hourly labels
- htwplus.css: Add CSS for input number of hours