String: Add empty() and constructor with string list
String: Add empty() and constructor with string list

jcdubois/DirectFB,jcdubois/DirectFB,kaostao/directfb,sklnet/DirectFB,djbclark/directfb-core-DirectFB,deniskropp/DirectFB,lancebaiyouview/DirectFB,sklnet/DirectFB,deniskropp/DirectFB,lancebaiyouview/DirectFB,djbclark/directfb-core-DirectFB,sklnet/DirectFB,lancebaiyouview/DirectFB,deniskropp/DirectFB,kaostao/directfb,djbclark/directfb-core-DirectFB,jcdubois/DirectFB,deniskropp/DirectFB,kaostao/directfb,sklnet/DirectFB,lancebaiyouview/DirectFB,djbclark/directfb-core-DirectFB