Build improvements: symlink resources properly with Visual Studio

Convert dependencies into a CMake build script in the `deps` dir

CMakeLists.txt

@@ -215,7 +215,7 @@ if (NOT GLEW_FOUND)
 endif ()
 include_directories(${GLEW_INCLUDE_DIRS})
 
-# Resources and l10n
+# l10n
 set(L10N_DIR "${SLIC3R_RESOURCES_DIR}/localization")
 add_custom_target(pot
     # FIXME: file list stale
@@ -225,19 +225,6 @@ add_custom_target(pot
     WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
     COMMENT "Generate pot file from strings in the source tree"
 )
-if (MSVC)
-    file(TO_NATIVE_PATH "${CMAKE_BINARY_DIR}/src/resources" WIN_RESOURCES_SYMLINK)
-    add_custom_target(resources_symlink ALL
-        COMMAND if not exist "${WIN_RESOURCES_SYMLINK}" ( mklink /J "${WIN_RESOURCES_SYMLINK}" "${SLIC3R_RESOURCES_DIR_WIN}" )
-        VERBATIM
-    )
-else ()
-    add_custom_target(resources_symlink ALL
-        COMMAND ln -sf "${SLIC3R_RESOURCES_DIR}" "${CMAKE_BINARY_DIR}/resources"
-        VERBATIM
-    )
-endif()
-
 
 # libslic3r, Slic3r GUI and the slic3r executable.
 add_subdirectory(src)