Added missing summaries.

Author: VitorCioletti

FluentScheduler/Fluent/1 - Run/RunSpecifier.cs

@@ -34,6 +34,10 @@ public RestrictionUnit Every(DayOfWeek day)
             return new RestrictionUnit(_calculator);
         }
 
+        /// <summary>
+        /// Runs the job according to the given interval.
+        /// </summary>
+        /// <param name="time">Time to run the job</param>
         public void Every(TimeSpan time)
         {
             var timeOfDay = new TimeSpan(time.Hours, time.Minutes, time.Seconds);

FluentScheduler/Fluent/3 - Duration/Day/DayUnit.cs

@@ -2,6 +2,9 @@
 {
     using System;
 
+    /// <summary>
+    /// The days the job should run
+    /// </summary>
     public class DayUnit
     {
        private readonly FluentTimeCalculator _calculator;

FluentScheduler/Fluent/3 - Duration/Month/MonthUnit.cs

@@ -1,8 +1,10 @@
 namespace FluentScheduler
 {
     using System;
-    using System.Linq;
 
+    /// <summary>
+    /// The months the job should run
+    /// </summary>
     public class MonthUnit
     {
         private readonly FluentTimeCalculator _calculator;

FluentScheduler/Fluent/3 - Duration/PeriodOnceSet.cs

@@ -2,6 +2,9 @@
 {
     using System;
 
+    /// <summary>
+    /// The "period" run has been set, but not its unit.
+    /// </summary>
     public class PeriodOnceSet
     {
         private readonly FluentTimeCalculator _calculator;

FluentScheduler/Fluent/4 - Restriction/RestrictionUnit.cs

@@ -4,6 +4,9 @@ namespace FluentScheduler
     using System.Collections.Generic;
     using System.Linq;
 
+    /// <summary>
+    /// Restricts when the schedule should run
+    /// </summary>
     public class RestrictionUnit
     {
         private readonly FluentTimeCalculator _calculator;