Document exact changes from upstream Caja

[strugee]

The README mentions that this is a "slightly loosened" version of Caja. There should be somewhere where I can read about exactly what this means - in particular, I need to know if this strips <style> tags/style= attributes or not.

[overint]

I agree, this would be very helpful.

[overint]

Found the changes.

html4.ATTRIBS['*::style'] = 0;
html4.ELEMENTS['style'] = 0;
html4.ATTRIBS['a::target'] = 0;
html4.ELEMENTS['video'] = 0;
html4.ATTRIBS['video::src'] = 0;
html4.ATTRIBS['video::poster'] = 0;
html4.ATTRIBS['video::controls'] = 0;
html4.ELEMENTS['audio'] = 0;
html4.ATTRIBS['audio::src'] = 0;
html4.ATTRIBS['video::autoplay'] = 0;
html4.ATTRIBS['video::controls'] = 0;