Add / Edit content

[alicetragedy]

@benedikt has done some fantastic work on getting this up and running (and getting a lot of the styling done). We now need to look into updating the content, before it gets added in here. I've created a document that anyone can edit/add to. This takes the content areas we had discussed during the RG Weekend in Helsinki (railsgirls/FrozenRailsWeekendHelsinki#11) with the names of who is responsible for which areas. Hopefully we should be able to add all the copy in there and finalize it, before getting it into the workbook file. Feel free to remove or add yourself, and to add content points as you see fit. :)