**** 2011/06/27 - version 0.2 ****

This is the first version available for public download. We wait your comments for futur improvments.

**** 2011/12/05 - version 0.3 ****

This version takes into account the new estimator of the ne survival proposed by Pohar-Perme et al. Moreover, the multicore computing is abandoned: the stability of this algorithm is very different depending on the computer and the operating system.