Revert commit 7eec859 ("Do not remove stuff from lists")

When removing a download, Angular doesn't update the download list correctly
when it receives new data unless we pull out the item that should be removed
from the array manually first.
Merge pull request #117 from polyphenolic/master

Revert commit 7eec859 ("Do not remove stuff from lists")
Update configuration.js for self use.
Revert "Update configuration.js for self use."

This reverts commit a861166999021a2dfc358435da8c9e5a490375e1.