Feature Request: Concat function

[omni5cience]

As a user of stencil.js I often find myself writing a simple handler function just to concatenate text with a stencil key. It would be be very convenient if this were built in to stencil.

Thanks.

[s4y]

Added a concatinator! Closed by e4ed908.

[s4y]

I like it.

['%a', { href: { join: [ "http://example.com/", { key: 'path' } ] } } ]

You can also include a separator key, if you'd like to join with spaces or somesuch.