[CHANGES]

• Added ->catch and ->catch_with_f
  
• Add catch-handler semantics to ->then / ->then_with_f
  
• Also pass fmap* items via $_ (RT105558)
  
• Undocument ->done_cb / ->fail_cb / ->cancel_cb
  
• Entirely delete ->and_then / ->or_else
  
• New barename documentation style including "since" versions
  
• Further document the idea of failure categories as used by catch*