Added translations to po/ file

Also added initial infrastructure to support them.  More work ahead.

cmake/Translations.cmake

@@ -0,0 +1,41 @@
+# Translations.cmake, CMake macros written for Marlin, feel free to re-use them
+
+macro(add_translations_directory NLS_PACKAGE)
+    add_custom_target (i18n ALL COMMENT “Building i18n messages.”)
+    find_program (MSGFMT_EXECUTABLE msgfmt)
+    file (GLOB PO_FILES ${CMAKE_CURRENT_SOURCE_DIR}/*.po)
+    foreach (PO_INPUT ${PO_FILES})
+        get_filename_component (PO_INPUT_BASE ${PO_INPUT} NAME_WE)
+        set (MO_OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${PO_INPUT_BASE}.mo)
+        add_custom_command (TARGET i18n COMMAND ${MSGFMT_EXECUTABLE} -o ${MO_OUTPUT} ${PO_INPUT})
+
+        install (FILES ${MO_OUTPUT} DESTINATION
+            share/locale/${PO_INPUT_BASE}/LC_MESSAGES
+            RENAME ${NLS_PACKAGE}.mo)
+    endforeach (PO_INPUT ${PO_FILES})
+endmacro(add_translations_directory)
+
+
+macro(add_translations_catalog NLS_PACKAGE)
+    add_custom_target (pot COMMENT “Building translation catalog.”)
+    find_program (XGETTEXT_EXECUTABLE xgettext)
+
+
+    set(C_SOURCE "")
+
+    foreach(FILES_INPUT ${ARGN})
+        file (GLOB_RECURSE SOURCE_FILES ${CMAKE_CURRENT_SOURCE_DIR}/${FILES_INPUT}/*.c)
+        foreach(C_FILE ${SOURCE_FILES})
+            set(C_SOURCE ${C_SOURCE} ${C_FILE})
+        endforeach()
+        file (GLOB_RECURSE SOURCE_FILES ${CMAKE_CURRENT_SOURCE_DIR}/${FILES_INPUT}/*.vala)
+        foreach(C_FILE ${SOURCE_FILES})
+            set(C_SOURCE ${C_SOURCE} ${C_FILE})
+        endforeach()
+    endforeach()
+
+    add_custom_command (TARGET pot COMMAND
+        ${XGETTEXT_EXECUTABLE} -d ${NLS_PACKAGE} -o ${CMAKE_CURRENT_SOURCE_DIR}/${NLS_PACKAGE}.pot
+        ${VALA_SOURCE} ${C_SOURCE} --keyword="_" --keyword="N_" --from-code=UTF-8
+        )
+endmacro()