2009-11-10 Arthur Allignol <arthur.allignol@fdm.uni-freiburg.de>

	* cpf: cpf returns a new item strata

	* plot.cpf, lines.cpf: mark.time is now FALSE by default.
	strata (cf. change in cpf) is used for legend labels when 
	none are provided.

	* [.cpf: Rewritten

2009-7-15 Arthur Allignol <arthur.allignol@fdm.uni-freiburg.de>

	* New lines and '[' methods for cpf objects

	* xyplot.cpfpo: Replaces plot.cpfpo

	* pseudocpf: New function to compute pseudo values. 
	New methods created (print and summary).
