Instatiate is not a word! Fixed typo

Also expanded the IGitDatabaseClient summary

Octokit/Clients/ActivitiesClient.cs

@@ -3,7 +3,7 @@
     public class ActivitiesClient : ApiClient, IActivitiesClient
     {
         /// <summary>
-        /// Instatiate a new GitHub Activities API client.
+        /// Instantiate a new GitHub Activities API client.
         /// </summary>
         /// <param name="apiConnection">An API connection</param>
         public ActivitiesClient(IApiConnection apiConnection)

Octokit/Clients/AssigneesClient.cs

@@ -7,7 +7,7 @@ namespace Octokit
     public class AssigneesClient : ApiClient, IAssigneesClient
     {
         /// <summary>
-        /// Instatiates a new GitHub Issue Assignees API client.
+        /// Instantiates a new GitHub Issue Assignees API client.
         /// </summary>
         /// <param name="apiConnection">An API connection</param>
         public AssigneesClient(IApiConnection apiConnection) : base(apiConnection)

Octokit/Clients/BlobsClient.cs

@@ -5,7 +5,7 @@ namespace Octokit
     public class BlobsClient : ApiClient, IBlobsClient
     {
         /// <summary>
-        /// Instatiates a new GitHub Git Blobs API client.
+        /// Instantiates a new GitHub Git Blobs API client.
         /// </summary>
         /// <param name="apiConnection">An API connection</param>
         public BlobsClient(IApiConnection apiConnection)

Octokit/Clients/CommitsClient.cs

@@ -5,7 +5,7 @@ namespace Octokit
     public class CommitsClient : ApiClient, ICommitsClient
     {
         /// <summary>
-        /// Instatiates a new GitHub Git Commits API client.
+        /// Instantiates a new GitHub Git Commits API client.
         /// </summary>
         /// <param name="apiConnection">An API connection</param>
         public CommitsClient(IApiConnection apiConnection) : 

Octokit/Clients/GistsClient.cs

@@ -5,7 +5,7 @@ namespace Octokit
     public class GistsClient : ApiClient, IGistsClient
     {
         /// <summary>
-        /// Instatiates a new GitHub Gists API client.
+        /// Instantiates a new GitHub Gists API client.
         /// </summary>
         /// <param name="apiConnection">An API connection</param>
         public GistsClient(IApiConnection apiConnection) : 

Octokit/Clients/GitDatabaseClient.cs

@@ -3,7 +3,7 @@
     public class GitDatabaseClient : ApiClient, IGitDatabaseClient
     {
         /// <summary>
-        /// Instatiates a new GitHub Git API client.
+        /// Instantiates a new GitHub Git API client.
         /// </summary>
         /// <param name="apiConnection">An API connection</param>
         public GitDatabaseClient(IApiConnection apiConnection) 

Octokit/Clients/IGitDatabaseClient.cs

@@ -1,7 +1,7 @@
 namespace Octokit
 {
     /// <summary>
-    /// A client for GitHub's Git API.
+    /// A client for GitHub's Git Database API. Gives you access to read and write raw Git objects and to list and update your references.
     /// </summary>
     /// <remarks>
     /// See the <a href="http://developer.github.com/v3/git/">Git API documentation</a> for more information.

Octokit/Clients/IssueCommentsClient.cs

@@ -7,7 +7,7 @@ namespace Octokit
     public class IssueCommentsClient : ApiClient, IIssueCommentsClient
     {
         /// <summary>
-        /// Instatiates a new GitHub Issue Comments API client.
+        /// Instantiates a new GitHub Issue Comments API client.
         /// </summary>
         /// <param name="apiConnection">An API connection</param>
         public IssueCommentsClient(IApiConnection apiConnection) : base(apiConnection)

Octokit/Clients/IssuesClient.cs

@@ -6,7 +6,7 @@ namespace Octokit
     public class IssuesClient : ApiClient, IIssuesClient
     {
         /// <summary>
-        /// Instatiates a new GitHub Issues API client.
+        /// Instantiates a new GitHub Issues API client.
         /// </summary>
         /// <param name="apiConnection">An API connection</param>
         public IssuesClient(IApiConnection apiConnection) : base(apiConnection)

Octokit/Clients/MilestonesClient.cs

@@ -7,7 +7,7 @@ namespace Octokit
     public class MilestonesClient : ApiClient, IMilestonesClient
     {
         /// <summary>
-        /// Instatiates a new GitHub Issue Milestones API client.
+        /// Instantiates a new GitHub Issue Milestones API client.
         /// </summary>
         /// <param name="apiConnection">An API connection</param>
         public MilestonesClient(IApiConnection apiConnection) : base(apiConnection)

Octokit/Clients/NotificationsClient.cs

@@ -7,7 +7,7 @@ namespace Octokit
     public class NotificationsClient : ApiClient, INotificationsClient
     {
         /// <summary>
-        /// Instatiates a new GitHub Activity Notifications API client.
+        /// Instantiates a new GitHub Activity Notifications API client.
         /// </summary>
         /// <param name="apiConnection">An API connection</param>
         public NotificationsClient(IApiConnection apiConnection) : base(apiConnection)

Octokit/Clients/ReferencesClient.cs

@@ -6,7 +6,7 @@ namespace Octokit
     public class ReferencesClient : ApiClient, IReferencesClient
     {
         /// <summary>
-        /// Instatiates a new GitHub References API client
+        /// Instantiates a new GitHub References API client
         /// </summary>
         /// <param name="apiConnection">An API connection</param>
         public ReferencesClient(IApiConnection apiConnection) :