timester in separated file
petit oubli
some improvement in trimester_function organisation
remove useless option
inital_date argument in pension_data
salref as parameter

to see...
sal_to_trimcot disappears
imput_sali_avpf
translate frequency in data
homogene trimester_function
small improvment (FP + sali_in_regime)
merge two func into validation_trimestres
remove sal_to_trimcot
nb_trim_bonif_CPCM useless
some work on trim_mda
only one mda function
remove select_unemployment

move it in TimeArray
small improvment
move unemployment trimester
solve a TODO