French language

start of translation
French Language v1.1
French language v1.2
French language : 50% default.po
Fr 75% default.po
Merge pull request #7 from ttomek32/master

Maintenance revision from ttomek32
Fr : default.po 100% 1.1
Full default.po & model_validation.po

first translation
Added some more strings. Corrected spanish translation
Merge pull request #6 from PtiLuky/master

First French translation
A few more strings and minor adjustments
Fr : corrections v1.01
Merge pull request #8 from PtiLuky/master

French correction
Polish Language v1.5 | Add new strings