Release v0.24 - A Sight For Sore Eyes (#1539)

* Add release notes and bump version to 0.24

* run "build FormatCode" to fix up whitespace/formatting issues

* Fix failing Ssh key tests due to "validation exception".  This key must be in use on github (under another user, most likely from these tests failing).  Changed to a new SSH key and tweaked tests to reduce chance of a key being created and not destroyed

* Assignee and Assignees cant both be specified on NewIssue.  We missed this one in the PR.  Marked Assignee as [Obsolete] and fixed tests to use Assignees

* Fix a couple of Reactions tests that were calling the wrong client methods

* Fix timeline tests - looks like the response class has changed shape a bit, it now has an Issue object in the payload and Id field isnt present (leaving Id field there in case other timeline events do use it)

* Fix some following tests that require the test user to follow more than 1 other user

* Unskip these Event tests now because apparently they work!

* add breaking changes notes

* Update ApiErrorMessageSafe to return null for empty and whitespace strings (#1540)

* return null if ApiError.Message is empty or whitespace

* Uncomment test, which now passes

* update release notes to include PR1540

* Add "Bot" AccountType, was causing a deserialization exception when running the integration test "SearchForExcludedLanguage" (#1541)

* Update to include PR1541

* add bullets to make release notes easier to read

* markup additional code mentions in notes

* Fix grammar

fields => field

Octokit/Models/Request/OrganizationRequest.cs

@@ -9,7 +9,6 @@ namespace Octokit
     [DebuggerDisplay("{DebuggerDisplay,nq}")]
     public class OrganizationRequest : RequestParameters
     {
-
         /// <summary>
         /// Intializes a new instance of the <see cref="OrganizationRequest"/> class.
         /// </summary>
@@ -17,10 +16,10 @@ namespace Octokit
         public OrganizationRequest(int since)
         {
             Ensure.ArgumentNotNull(since, "since");
-          
+
             Since = since;
         }
-      
+
         /// <summary>
         /// Gets or sets the integer Id of the last Organization that you've seen.
         /// </summary>
@@ -28,10 +27,10 @@ namespace Octokit
 
         internal string DebuggerDisplay
         {
-          get
-          {
-            return string.Format(CultureInfo.InvariantCulture, "Since: {0} ", Since);
-          }
+            get
+            {
+                return string.Format(CultureInfo.InvariantCulture, "Since: {0} ", Since);
+            }
         }
     }
 }