create a `new` command

[toracle]

To use current init command, an user should make an empty directory for a project, go inside of the directory and run bothub init command. I choose this action after nodejs/npm.

But it may confuses or cumbersome to make an empty directory by their own hand. Because some other frameworks like django makes a project directory for user when django-admin startproject.

So I think it's better to make a new or startproject like command.

[arun-company]

command should be bothub new -> will follow the bothub init just create a new Directory the same name as new project. After create a project, what else information that users should get or what else that we should show the user.

[toracle]

In contrast with bothub init, an user should enter the newly created project directory. I think we need to notifies it to user, 'now xxxxx is created. enter the directory, and do next actions like these...'