Add Lightncandy and rewrite runall.sh

Hey, guys. I rewrote runall.sh. Now it's pretty with colors, and uses ```bc``` to get min, max, average values of the 10 runs.

In addition, I also added a new library to test, a Handlebars implementation in PHP. https://github.com/zordius/lightncandy -- Is this the correct way to do it, or would you have preferred a submodule of that repository?

Thanks,
Shahyar