This commit contains a refactoring of the LDAP connection handling to enable access for all users of the HTW Berlin.

Classes:
- AccountController: Code and naming improvements, add of email for user, add i18n, add JavaDoc
- LDAPConnector: Complete refactor with configurable values, code improvements, add JavaDoc

Templates:
- All templates are refactored due to the naming refactoring of Notification

Other:
- application.sample.conf: Add default parameters for LDAP connector
- messages: Add i18n for LDAP connector and authenticate controller
Merge remote-tracking branch 'origin/33_ldapRefactoring' into develop

Conflicts:
	app/controllers/AccountController.java
	conf/messages
CSS:
- htwplus.css: Put margin into notification-element