Squashed commit of the following: Add support for Zepto.

commit daaf25296726b09cf0dd35d96091b4a23faa5667
Author: Alejandro García Iglesias <ale.garciaiglesias@gmail.com>
Date:   Wed Apr 17 14:12:49 2013 -0300

    Update packed script with Zepto support.

commit fe2ebc8fc3c78325e00da0a74ef2c135c66684f2
Author: Alejandro García Iglesias <ale.garciaiglesias@gmail.com>
Date:   Wed Apr 17 13:59:47 2013 -0300

    Add support for Zepto.