v4.51

Juste a few additionnal corrections

v4.5: PWLF modified

Modifications added in CROSSROAD cruise ==> PWLF moved in the Time Drift Correction section.

v4.4

A piece wise linear fitting was added to the Time Drift Gain Calculation.

4.3b

A few modifications from C. Kermabon and T. Reynaud

Version 4.3

New release, few bugs and new manual.