[#121,project/show][s]: tweaks to layout at top of page.

* larger buttons on right and have as a button group
* no description heading at top of readme
* change to css selectors rather than ids
[#80,ux][s]: nicer editing of a project's name.
[#121,ux][s]: read more next to title now wired up to show readme.
Merge branch 'master' into gh-pages
Merge branch 'gh-pages' of github.com:okfn/dataexplorer into gh-pages