Remove all pull request links
Fix 'Source code' links to commits (not master)

@mlecoeuvre
Fix broken bulletted lists
Make Functions bold without <b> in the title

@mlecoeuvre
Remove Travis build for gh-pages

We don't really need this since we always test it locally anyway.
Merge pull request #374 from agouge/small-improvements

Fix several small problems on the website

* Remove all pull request links (Added #___)
* Fix 'Source code' links to commits (and not master)
* Fix broken bulleted lists
* Make Functions bold without `<b>` in the title

Also I remove the Travis build for `gh-pages` because we test it locally anyway.