README.md in tracker_api-1.7.1 vs README.md in tracker_api-1.8.0

@@ -66,13 +66,24 @@
                                           id:         847762630)          # Use the Story resource to get the story
 comments = story.comments                                                 #   comments without first fetching the story
 
 comment = story.create_comment(text: "Use the force!")                    # Create a new comment on the story
 
+comment = story.create_comment(text: "Use the force again !",             # Create a new comment on the story with
+                                files: ['path/to/an/existing/file'])      #     file attachments
+
 comment.text += " (please be careful)"
 comment.save                                                              # Update text of an existing comment
+comment.delete                                                            # Delete an existing comment
 
+comment.create_attachments(files: ['path/to/an/existing/file'])           # Add attachments to existing comment
+comment.delete_attachments                                                # Delete all attachments from a comment
+
+attachments = comment.attachments                                         # Get attachments associated with a comment
+attachments.first.delete                                                  # Delete a specific attachment
+
+comment.attachments(reload: true)                                         # Re-load the attachments after modification
 task = story.tasks.first                                                  # Get story tasks
 task.complete = true
 task.save                                                                 # Mark a task complete
 
 epics = project.epics                                                     # Get all epics for a project
@@ -93,10 +104,14 @@
 client.project(project_id, fields: ':default,epics')                      # Eagerly get epics with a project
 client.project(project_id).stories(fields: ':default,tasks')              # Eagerly get stories with tasks
 story.comments(fields: ':default,person')                                 # Eagerly get comments and the person that made the comment for a story
 ```
 
+## Error Handling
+`TrackerApi::Errors::ClientError` is raised for 4xx HTTP status codes  
+`TrackerApi::Errors::ServerError` is raised for 5xx HTTP status codes
+
 ## Warning
 
 Direct mutation of an attribute value skips coercion and dirty tracking. Please use direct assignment or the specialized add_* methods to get expected behavior.
 https://github.com/solnic/virtus#important-note-about-member-coercions
 
@@ -116,9 +131,10 @@
 
 ## TODO
 
 - Add missing resources and endpoints
 - Add create, update, delete for resources
+- Error handling for [error responses](https://www.pivotaltracker.com/help/api#Error_Responses)
 
 ## Semantic Versioning
 http://semver.org/
 
 Given a version number MAJOR.MINOR.PATCH, increment the: