JSON-Template

[George Moschovitis]

Dear devs,

introducing a slightly different version on JSON-Template was a
deviation from an important Nitro principle: Be standards compliant.

For this reason, I plan to deprecate the simple templating system of
Nitro in favor of JSON-template.

As a first step I intruduced section, repeated section, or, and @
aliases.

I also updated the blog-gae example to use these.

Please note that you have to use repeated section for array variables.
This makes the code more readable and transparent and improves the
implementation.


regards,
George.

PS: I still think that section is ugly, but a standard is a standard.