The list_component function now accepts any function
Addition of the ticket_parents getter in trhaelppyercthon and trac_cmd
ticket_mine_pending now shows also the new tickets.
Addition of some information about the shown tickets in ticket_mine
The ticket_changelog method now avoid printing the empty comments.

This information is really not interresting
changelog are reversed before being displayed because I prefer the oldest first order
Extract the parsing part of ticket_recent_changes
Nicer display of the date. Make sure the date the user enters may be copied/pasted from a ticket_recent_changes call