ENH: internationalization (add template, start full french translation)

Code/Visualization/otbImageWidgetPackedManager.fl

 # data file for the Fltk User Interface Designer (fluid)
-version 1.0107 
-header_name {.h} 
+version 1.0107
+i18n_type 1
+i18n_include "otbI18n.h"
+i18n_function otbGetTextMacro
+header_name {.h}
 code_name {.cxx}
 class ImageWidgetPackedManager {open
 } {
@@ -44,4 +47,4 @@ class ImageWidgetPackedManager {open
       }
     }
   }
-} 
+}

Code/Visualization/otbImageWidgetSplittedManager.fl

 # data file for the Fltk User Interface Designer (fluid)
-version 1.0107 
-header_name {.h} 
+version 1.0107
+i18n_type 1
+i18n_include "otbI18n.h"
+i18n_function otbGetTextMacro
+header_name {.h}
 code_name {.cxx}
 class ImageWidgetSplittedManager {open
 } {
@@ -27,4 +30,4 @@ class ImageWidgetSplittedManager {open
       xywh {1309 633 215 160} type Double box UP_BOX color 52 selection_color 7 labelcolor 187 resizable visible
     } {}
   }
-} 
+}

I18n/CMakeLists.txt

@@ -57,4 +57,4 @@ foreach(locale ${locale_list})
         )
 endforeach(locale ${locale_list})
 
-add_custom_target(OTBIO DEPENDS ${mo_file})
+add_custom_target(OTBI18N ALL DEPENDS ${mo_files})