Add translations support (#82)

* Add translations support
* Update .gitignore

CMakeLists.txt

@@ -114,6 +114,7 @@ pkg_check_modules(LIBUSBMUXD libusbmuxd)
 pkg_check_modules(LIBPLIST libplist)
 pkg_check_modules(LIBDEEZER libdeezer)
 pkg_check_modules(LIBDZMEDIA libdzmedia)
+find_package(Gettext)
 
 if(WIN32)
   find_package(ZLIB REQUIRED)
@@ -151,6 +152,11 @@ if(WIN32)
   set(QT_LIBRARIES ${QT_LIBRARIES} Qt5::WinExtras)
 endif()
 
+find_package(Qt5LinguistTools CONFIG)
+if (Qt5LinguistTools_FOUND)
+  set(QT_LCONVERT_EXECUTABLE Qt5::lconvert)
+endif()
+
 if(X11_FOUND)
   find_path(KEYSYMDEF_H NAMES "keysymdef.h" PATHS "${X11_INCLUDE_DIR}" PATH_SUFFIXES "X11")
   find_path(XF86KEYSYM_H NAMES "XF86keysym.h" PATHS "${XCB_INCLUDEDIR}" PATH_SUFFIXES "X11")
@@ -346,6 +352,11 @@ optional_component(SPARKLE ON "Sparkle integration"
   DEPENDS "Sparkle" SPARKLE
 )
 
+optional_component(TRANSLATIONS OFF "Translations (No languages included yet)"
+  DEPENDS "gettext" GETTEXT_FOUND
+  DEPENDS "Qt5LinguistTools" Qt5LinguistTools_FOUND
+)
+
 optional_component(STREAM_TIDAL ON "Streaming: Tidal support")
 
 if (LIBDZMEDIA_FOUND OR LIBDEEZER_FOUND)