LRU算法初步
LRU算法完成

有人用了hashmap么
修改指令表生成

主程基本完成，还剩：1.重构 2.一套亮瞎狗眼的UI
Merge branch 'LRU'
Merge branch 'master' into LRU
Revert "Merge branch 'master' into LRU"

This reverts commit 177649964a0908213900355b14a6c69e71655091, reversing
changes made to de1fef66f8eec93e3aba4bda5431abdf6c16bbb4.
Merge pull request #1 from Dachang/LRU

Lru