Set reuse address option (fixes #1043)

When the server is killed there may still be client-sockets connected in
the TIME_WAIT state, causing the bind() call to fail. With the
REUSEADDR option we can reuse the address immediately unless another
process is actually *listening* on the same address.
that we want to reuse the address
Verbose name of Assignment inserted, fixed #1036

It is neccessary to refresh the database table for the content types, e. g. by deleting the database and runing syncdb.
Merge pull request #1053 from andkit/fix-1043

Set reuse address option (fixes #1043)
Merge pull request #1057 from normanjaeckel/TransAssignmentString

Verbose name of Assignment inserted, fixed #1036
Sort requirements, fix #1031.
Add tests according to issue #931.
Merge pull request #1058 from normanjaeckel/Tests_931

Add tests according to issue #931.
Merge pull request #1056 from normanjaeckel/SortRequirements

Sort requirements, fix #1031.
Set reuse address option (fixes #1043)

When the server is killed there may still be client-sockets connected in
the TIME_WAIT state, causing the bind() call to fail. With the
REUSEADDR option we can reuse the address immediately unless another
process is actually *listening* on the same address.
that we want to reuse the address
Verbose name of Assignment inserted, fixed #1036

It is neccessary to refresh the database table for the content types, e. g. by deleting the database and runing syncdb.
Sort requirements, fix #1031.
Add tests according to issue #931.
Merge remote-tracking branch 'openslides/stable/1.5.x'
Rework DjangoStaticFileHandler (fixes #1034)

Fixes multiple issues
 - Unicode errors when path contained non-ascii characters

 - 403 errors when the current working directory was not a parent
   directory of the static files

 - "API abuse" super() implementation of the get() method was passed a
   filesystem path instead of the url-path it was expecting

 - The above could also lead to 403 errors on case-insensitive file
   systems due to the way the base-class resolved and validated paths
   with respect to self.root
Merge pull request #1054 from andkit/fix-1034

Fix unicode errors when getting static files (fixes #1034)
fix #1044 Remove GNU GPL header
Fixed #947: Move pdf functions of participant app to new pdf.py
Fixed #1070 (Clear search index for deletedb and syncdb command)
Make sure QuestionView.get_question_message is in a unicode context.

This is important if the attribute question_message is set with
ugettext_lazy which needs an unicode context

Fixes #1066
Merge pull request #1062 from DerPate/fix#1044

Fix#1044