Draft of vchan update blog post

Signed-off-by: Jon Ludlam <jonathan.ludlam@citrix.com>
Add a bit of code, capitalize Mirage and a couple of other changes
Make the filename reflect the title defined in #168
Add blog post
Fix missing semicolon
vchan: a bit more framing and conclusion
marginally more interesting title :)
vchan: tidy up code layout
Merge branch 'master' of https://github.com/mirage/mirage-www into tcpip-post

Conflicts:
	src/data.ml