[*] remove luaotfload.lua from dtx
[main,gitignore] add self-contained luaotfload.lua
[main] move luaotfload.lua -> luaotfload-main.lua
[*] adapt references to luaotfload.lua
[doc] update news
[doc] update graph
[*] updat Makefile
[main] restore line that got lost during the move
[*] use different placeholder date in .sty