Update pcache.c
Update sqliteLimit.h
Update pcache.h
Update shell.c
Merge pull request #38 from qihuidan/master

Update pcache.c
Merge pull request #39 from yujiesun/master

Update sqliteLimit.h
Merge pull request #40 from LIANGJINGW/shell-group1

Update shell.c
Merge pull request #21 from HuiLi/master

合并更新