rssi: Ruby-like simple string interpolation

> Rssi is 10x faster than Mustache, and 25-30x faster than Underscode and Lo-Dash templates (Rssi does about 1,300,000 ops/sec on my old Mac Mini, with Mustache scoring 130,000 and Lo-Dash about 45,000).

http://dailyjs.com/2013/09/02/backbone-rssi/