Add kdi alias for easy KISSCMS clone setup

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Setting up a KISSCMS clone is easy enough - the main files are located at:

https://gist.github.com/4243370

It would be nice if the kdi executable mapped the command of downloading those files and extracting them.

For example:

kdi kisscms clone 

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The link for the archive downloaded is:
https://gist.github.com/gists/4243370/download

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As an added feature it would be nice if the env.json is created after the extraction of the files