Install more plugin: indentLine, delimitMate, supertab, NERD tree.

1, indentLine: https://github.com/Yggdroot/indentLine
2, delimitMate: https://github.com/Raimondi/delimitMate
3, supertab: https://github.com/ervandew/supertab
4, NERD tree: https://github.com/scrooloose/nerdtree