Extract anonymous function for navigation links.
Fix icons provided by bootstrap.

Fixes #94.
Add space between icon and link text.
Add test for e-mail address in status.
E-mail address in status gets detected.

Fixes #96.

Note: Mentions need at least one trailing space before the @.
Add tests for mention detection.
Fix  space before @ of mention after linkifying.
Fix linkifying of mentions at begin of line.

Fixes #96.
Merge pull request #95 from mvitz/fix-bootstrap-icons

Fix bootstrap icons.
Merge pull request #98 from mvitz/fix-mentions-of-emailaddresses

Fix mentions of e-mail addresses in status.
Set lang to get around locale issues