feat: Add 'IsEmpty' and 'IsComplete' properties to SandboxId and Deployment respectively.

Author: paulhazen

com.playeveryware.eos/Runtime/Core/Config/Deployment.cs

@@ -31,6 +31,19 @@ public struct Deployment : IEquatable<Deployment>
 
         public Guid DeploymentId;
 
+        /// <summary>
+        /// Indicates whether a deployment is completely defined or not. A
+        /// deployment is completely defined if neither the sandbox id nor the
+        /// deployment id are empty.
+        /// </summary>
+        public readonly bool IsComplete
+        {
+            get
+            {
+                return !DeploymentId.Equals(Guid.Empty) && !SandboxId.IsEmpty;
+            }
+        }
+
         public bool Equals(Deployment other)
         {
             return SandboxId.Equals(other.SandboxId) && DeploymentId.Equals(other.DeploymentId);

com.playeveryware.eos/Runtime/Core/Config/SandboxId.cs

@@ -70,6 +70,21 @@ readonly get
             }
         }
 
+        /// <summary>
+        /// Indicates whether the sandbox id is empty. A sandbox id is empty if
+        /// either the underlying value is null or empty, or if the underlying
+        /// value is equal to the string value for an empty Guid with the dashes
+        /// removed.
+        /// </summary>
+        public readonly bool IsEmpty
+        {
+            get
+            {
+                return String.IsNullOrEmpty(_value) || 
+                       Guid.Empty.ToString().Replace("-", "").Equals(_value);
+            }
+        }
+
         public readonly bool Equals(SandboxId other)
         {
             return _value == other._value;