build.sh: code structure improvement
Add user id to JSON user export

If "add personal data" is selected, the username serves as the main key
and the user id wasn't in its attributes.
Add optional attributes to JSON user export
build.sh: Added support for fedora
build.sh: Silenced Fedora groupinstall
build.sh: Small Codestructure improvement
build.sh: Suppress stderr of which

Some implementations of which write to stderr on error.
Remove typo
Do not allow voting in frozen instances

Currently, users can still vote in an instance that has been marked as frozen. Since voting can have significant changes on the appraisal of the content, it should not be allowed in frozen instances.
Fixes hhucn/adhocracy.hhu_theme#422
Merge pull request #513 from phihag/voting-in-frozen-instances

Do not allow voting in frozen instances
Make user.optional_attributes a TEXT column

There is no reason to have a fixed limit (as inherent to a VARCHAR column) on that column.
Additionally, the column being a VARCHAR without an explicit size limit breaks on MySQL (fixes hhucn/adhocracy.hhu_theme#428).
The migration script corrects installations that are already on 68/VARCHAR.
Remove useless import
Merge pull request #514 from phihag/fix-optional-attributes-text

Make user.optional_attributes a TEXT column
add noscript message (similar to lte IE 7 message)
document supported browsers (adopted from #111)
Merge remote branch 'xi/feature-111-supported-browsers' into develop
Merge branch 'develop' of https://github.com/liqd/adhocracy into develop
Remove unneeded file again

templates/user/edit.html has been accidently readded in
03f382dac7e0248f221a94f51854c8f79191d961.
reorder functions (trivial)
Add type cast parameter to config.get_list