Use sidebar navigation on documentation page

This commit is a first iteration of a reorganization of the documentation
page.
Use definition style on documentation page

Replace the old quotes style (gray bars) with the new definiton
(no gray bars) style for text blocks.
Add 3 publications to the documentation page
Convert the publications page to the new style

Change the old quote style to the new style.
Merge pull request #49 from fracek/documentation_rework

Documentation rework