Minor cosmetic changes to provide more header room

Moved the actions menu up, in order to provide more room for the page
title.

Added `text-align: justify` to paragraphs in the text.
Merge branch 'codemirror-integration' into mygollum
Added basic citation support
Merge branch 'citation-support' into mygollum
Updated documentation with citation support
Merge branch 'citation-support' into mygollum
Merge branch 'master' of github.com:pipex/gollum into codemirror-integration
Merge branch 'mygollum' of github.com:pipex/gollum into codemirror-integration