Update index.md

Removed these comments because they have been turned into h annotations: 
* Comment BY 'Dan Whaley' ON '2014-09-03T16:06:56'
		* Can you clarify what you mean by integration?'
			* Comment BY 'Rebecca Welzenbach' ON '2014-09-03T16:06:56'
				* 'We were just thinking here of possible web-based, version-controlled authoring platforms that already exist; environments where cycles of review and editing might take place. So in this case, we imagined annotations being integrated back into a text, forming a new version of that file.'