v0.99991: fix appendix captions

bump up version to v0.99991

v0.9999: enable appendix

• remove unnecessary tikz-related command (#7)
• delete obsoleted command \references

v0.999b: bug fix

• fix hyperref bookmarks error of "acknowledgement"
• fix redundant space in references "[EB /OL]" error

DO NOT use v0.999a since the \normalsize setting incorrectly !

v0.999: Detect font STZhongsong automatically

• make noextrafonts deprecated, and detect STZhongsong automatically
• new option heitipatch to make bold characters heiti
• fix the title font to be heiti instead of heiti in bold
• force XeTeX / XeLaTeX

v0.991: avoid orphans and widows

avoid orphans and widows

v0.99

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

v0.91

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

v0.9

init commit