Back Button Fix, Version Update, and README update

The repeat stage was being a pain like usual, so there is not undo button for the repeat stage.

The main issue that I was having was when the #go_back_button was pressed in case 4 of task_change_stage() it would run through the normal ajax "loop" and all that, but it didn't seem like it was calling the go_add_post function correctly.  It never decreased the wp_go.status of the page or reduced the user's wp_go.points back to what they where before the user pressed the master button.  I don't have the slightest idea as to why it is fudging up there.