Remove dead additional info links.

closes #27
Merge branch 'refs/heads/bugfix/remove-additional-info-links-27-rebased' into release/0.6-delicious-mofongo
Update github urls after the move to teikei organization.

closes #29

Conflicts:
	README.md
	app/templates/text_blocks/terms.de.html.haml
Merge branch 'refs/heads/bugfix/update-repository-urls-29-rebased' into release/0.6-delicious-mofongo
Fix signup link in participation info dialog.

closes #28
Merge pull request #42 from sjockers/bugfix/fix-signup-link-28

Fix signup link in participation info dialog.
Change null check to include undefined and null.
Only show maximum members entry if it has a value.

closes #43