one line script command install

[halida]

like on-my-zsh: https://github.com/robbyrussell/oh-my-zsh

We need quick install ask on a new server, one line install script is a must.

[yangchenyun]

@lovvvve I think you could take care of this.

Currently, as it still dependent on nodejs so the steps include:

• install node + npm
• use npm install -g to install the bin globally

There is an potential issues for the conflicts on name ask, I am not sure it is a good name, I am afriad there will be conflicts with other command line tools.