插件管理
vim-plug
Cscop
映射键在VNC中不工作，可以修改成两个字母的组合。原文见：
https://stackoverflow.com/questions/20822651/nmap-key-maps-not-working-with-vim-cscope
nmap zs :cs find s =expand("")
nmap zg :cs find g =expand("")
nmap zc :cs find c =expand("")
nmap zt :cs find t =expand("")
nmap ze :cs find e =expand("")
nmap zf :cs find f =expand("")
nmap zi :cs find i ^=expand("")$
nmap zd :cs find d =expand("")
ctags
nerdtree
taglist
显示在一个文件中的tags
ctags有不同版本要注意
https://sourceforge.net/p/ctags/mailman/message/1876492/
