CSS: Hide docs menu that was getting mixed up on smaller devices

should make the site OK on phones.
Merge pull request #108 from AltGr/disp-phone

CSS: Hide docs menu that was getting mixed up on smaller devices
Specify doc menus from the wiki, and include 1.2 doc
Merge pull request #109 from AltGr/include-1.2-doc

Specify doc menus from the wiki, and include 1.2 doc
Add base dir for feed entries
Blog: ignore non md or html files
local_data
Update wiki subrepo link and makefile for new platform-blog repo
Use absolute URLs in 'self' links and post images

Feedly is broken and doesn't understand base URLs. We assumed that post
bodies were still relative to the post directory and not the feed
itself. Now absolute URLs are used for both self links and embedded
images. Fixes ocaml/platform-blog#12.