Begun integration of models and managers

The HotelManager class now has been connected to some aspects of the
command line interface and is functioning for a few cases such as
logging in as a specific guest via email, chaging a guests information
and creating a new guest account. This was implemented first over the
reservation system to test and implement something on a smaller scale.
Furthermore, the reservation depends on an existing guest account since
a Guest ID needs to be linked to the reservation that is created.
Other changes include redesigning, tweaking/ adjusting, and/ or fixing
of other modules that have not yet been implemented or are partially
implemented.

OpheliasOasis/Models/Room.cs

@@ -4,7 +4,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
-namespace OpheliasOasis.Models
+namespace Ophelias.Models
 {
     internal class Room
     {