Benchmarks for the robustness!

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Look at:

• https://github.com/denji/php-tpl-engine-bench
• https://github.com/wrakky/php-template-engine-benchmarks
• https://github.com/akadan47/php_template_engines_benchmark

Don't forget about http://laravel.com/docs/4.2/templates

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Coverage done via travis+coveralls.