Migrate release notes from wiki to repo
Remove [unreleased!] from title
Prepare release notes for 4.13
Increase running time of statement. Fixes #963.

The time between starting the statement and calling the future is
arbitrary. Now the execution time of the statement is very very long.
This ensures that the statement is not already finished when the
future is called.
Merge pull request #967 from stefanbirkner/fail-on-timeout

Increase running time of statement. Fixes #963.