README.md in pivotal_to_pdf-0.9.1 vs README.md in pivotal_to_pdf-1.0.0

@@ -19,11 +19,39 @@
     token: your-api-token-of-pivotal-tracker
     project_id: your-ptroject-id
 
 After install the gem, you can do:
 
-* pivotal_to_pdf iteration       # print stories for the current iteration into a PDF file
+* pivotal_to_pdf current_iteration       # print stories for the current iteration into a PDF file
+
 * pivotal_to_pdf story STORY_ID  # print a single story specifed by ID into a PDF file
+
+* pivotal_to_pdf iteration iteration_number # print a single iteration specifed by the number into a PDF file
+
+Examples:
+
+```bash
+
+pivotal_to_pdf story 159898
+
+pivotal_to_pdf current_iteration
+
+pivotal_to_pdf iteration 42
+```
+
+Type in
+
+```bash
+pivotal_to_pdf help
+
+pivotal_to_pdf help story
+
+pivotal_to_pdf help current_iteration
+
+pivotal_to_pdf help iteration
+```
+
+for more usage information
 
 The gem will then read the story/stories and print it into a PDF file
 
 The points section will be printed only for features. Bugs and Chores don't have points