bump up version to v0.99991

bump up version to v0.9999

hotfix: fix `\normalsize` to `-4`

upgrade the version to v0.999

avoid orphans and widows

1. make command `\references` obsoleted (use `\printbibliography` dir…

…ectly); 2. make option `minimal` imply `nobib`; 3. multiple format corrections

adjust the space in / between display equations, figure captions, tit…

…les, headers & footers

support Overleaf (use documentclass option `noextrafonts`)

support to print without `\maketitle`

init commit