* Minor doc and comment corrections
* Fixed bug where it was impossible to make attachments from 'after scenario' hook, also removed some dud comments.
* typo
* support multiple calls to the Attach() function from a single step
* run_progress_test.go changed so it's not sensitive to the name of the clone target directory
* applied code review comments also added _example/attachments
* applied code review comments also added _example/attachments
* applied code review comments also added _example/attachments