Added, changed:

Done 18 nov:
- Fixed database login check

Done 19 nov:
- Send parameters back to other servlets

Done 20 nov:
- Let servlets catch other parameters and process them inside Switch
statements
- Replaced code for new code HTML and CSS
- Hashed password for database, will check with bean for authentication
- Added switch cases for error parameters inside the Users servlet

Done 22 nov:
- Made switch statements inside the authentication servlet, for routing
- Made some minor bug fixes
- Refactored some code inside the Servlets