#31 French language support for MOBAC

[Jean-Claude Repetto]

This patch adds french messages and menus to MOBAC.
I also corrected a few typos in the English version.
I think the file src/main/resources/mobac/resources/text/localize_en.properties is not used and can be removed safely.

[r_x]

Thanks for the patch. I changed the button layout in the tile store coverage panel a bit because otherwise the complete left panel would have had a very large width.

The width is still a bit larger because of the "Layer settings" panel title.

[Jean-Claude Repetto]

I changed some messages to further reduce the left panel width.
And I also changed the language name (It is "Français", not "Française").

[r_x]

Already applied the second patch