Merge pull request #9 from HuiLi/master

Merge pull request #22 from MinfeiZhou/master
更新vdbe.c和sqliteInt.h

vdbe.c：对原有翻译作了补充、修改，翻译操作码And、Or、Permutation、Compare、Jump。
sqliteInt.h：对一些vdb.c中涉及的借口做了注释。
Merge pull request #23 from MinfeiZhou/master

更新vdbe.c和sqliteInt.h