- added experimental support of custom headers sending in outgoing request (refs [#137](https://github.com/n1k0/casperjs/issues/137) - PhantomJS 1.6 required)
- switched to more standard `.textContent` property to get a node text; this allows a better compatibility of the clientutils bookmarklet with non-webkit browsers
- casper modules now all use [javascript strict mode](http://www.nczonline.net/blog/2012/03/13/its-time-to-start-using-javascript-strict-mode/)