ctex 宏包 v2.0

This is a major release, prepared for TeX Live 2015.

大版本更新，拟在 TeX Live 2015 中使用。

The last release of `ctex` 1.x

This is the ctex package at version 1.02d, the last release of ctex 1.x.
This version of the ctex package was contained in TeX Live 2014 and older version of it, as well as MiKTeX.