Require anonymous users to solve a captcha to comment on a poll
Use displayName attribute from LDAP

If the LDAP user data contains a "displayName" attribute,
this is used instead of the configured or default dudel name format.
Fix migration for commit 0504167
Float division by zero fix
Improve poll design

* Add fancy tooltip to choice sums
* Do not wrap edit buttons after votes
Improve 91741e2
Fix CSS
Allow admins to delete and modify everything
Disable recaptcha if no public key set
Fixed javascript for selecting votes (was not in sync with radio fields)
Add requirements.txt
Merge branch 'hotfix'

Conflicts:
	Makefile
	dudel/models.py
	requirements.txt