[Nitro] AdminController

[George Moschovitis]

> George fixed/optimized this in glycerin by only reloading the
> controller when a watched file (any watched file, *.rb, *.xhtml)
> is changed, causing the admin screens to now be quite snappy :)

btw, I improved/fixed this further. Moreover, since it is so fast now,
I have enabled it by default on the live (production) setup (with 2
mins sleep though...)

thanks for the tip Tim :)

-g.

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