Remove breadcrumb from overridden home page.

If you set a random page as your homepage (by setting `URL: `, yes, blank)
the page's title no longer shows up in the breadcrumb section (just the house
remains, after all you are home).
Adds a link rel="canonical" to index, articles and pages.
make aboutme.html behave, remove undocumented and unnecessary SHOW_ABOUTME, whitespace corrections, move aside to base.html to make clear that everything there is supposed to be aside without looking into includes
update examples.md
reset word-break for aboutme
Updated Bootstrap to 3.2.0 and updated all Bootswatch themes. Added 'paper' and 'sandstone' themes.
Set image width to 100% for article lists