Renamed IRepository::CheckoutFiles to DiscardChanges to better reflect its functionality

Author: neuroKip

src/GitHub.Api/Git/IRepository.cs

@@ -4,7 +4,7 @@
 namespace GitHub.Unity
 {
     /// <summary>
-    /// Represents a repository, either local or retreived via the GitHub API.
+    /// Represents a repository, either local or retrieved via the GitHub API.
     /// </summary>
     public interface IRepository : IEquatable<IRepository>
     {
@@ -18,7 +18,7 @@ public interface IRepository : IEquatable<IRepository>
         ITask Revert(string changeset);
         ITask RequestLock(string file);
         ITask ReleaseLock(string file, bool force);
-        ITask CheckoutFiles(List<string> files);
+        ITask DiscardChanges(List<string> files);
 
         void CheckLogChangedEvent(CacheUpdateEvent gitLogCacheUpdateEvent);
         void CheckStatusChangedEvent(CacheUpdateEvent cacheUpdateEvent);

src/GitHub.Api/Git/Repository.cs

@@ -112,7 +112,7 @@ public ITask ReleaseLock(string file, bool force)
             return repositoryManager.UnlockFile(file, force);
         }
 
-        public ITask CheckoutFiles(List<string> files)
+        public ITask DiscardChanges(List<string> files)
         {
             return repositoryManager.CheckoutFiles(files);
         }