Update Inquirer to 0.2 (and change conflicter prompt)

Hi there,

Inquirer 0.2 just been launched.

It adds a couple new features:
- New prompts: `expand`, `checkbox` and `password`
- Unicode char now used for Mac and Linux env
- `choices` array can now be a function to allow filtering available choices depending on previous answers
- Tests and internal refactoring for easier maintainability and a more robust support for differents OS

Also, as there's now a prompt type supporting the old conflicter interface, I updated the conflicter to use the new `expand` prompt.

![Expand prompt closed](https://dl.dropboxusercontent.com/u/59696254/inquirer/expand-prompt-1.png)
![Expand prompt expanded](https://dl.dropboxusercontent.com/u/59696254/inquirer/expand-prompt-2.png)