Data model - Improved encapsulation

Conditions - Renamed from DisplayConditions to DataModelConditions to better match their nature
Core - More documentation

src/Artemis.Core/Plugins/Modules/ActivationRequirements/BooleanActivationRequirement.cs

@@ -16,6 +16,7 @@
             return ActivationMet;
         }
 
+        /// <inheritdoc />
         public string GetUserFriendlyDescription()
         {
             return "No description available";

src/Artemis.Core/Plugins/Modules/ActivationRequirements/ProcessActivationRequirement.cs

@@ -43,6 +43,7 @@ namespace Artemis.Core.Modules
                 : processes.Any();
         }
 
+        /// <inheritdoc />
         public string GetUserFriendlyDescription()
         {
             var description = $"Requirement met when \"{ProcessName}.exe\" is running";