RTLCodingGuideline

说明：  收集了很多好的风格及代码的指导准则供参考，遵守这些代码风格及代码指导准则可以提高VHDL程序的可读性，且易于修改。
(collected a lot of good style and code guidelines for reference, compliance with these codes and code style guidelines VHDL procedures can improve the readability and easy to change.)