[change] from_deluge: Always provide all info from deluge in standardized `deluge_` prefixed fields
[change] from_deluge: Remove `keys` option

[change] from_transmission: Now provides more info in `transmission_` prefixed fields
[change] from_transmission: onlycomplete option changed to only_complete, now False by default
[change] transmission: Added `action` option, to allow pause/resume/remove/purge of torrents in transmission
[change] transmission: Added underscores between words in multi-word options
[change] clean_transmission: This plugin has been deprecated

[change] deluge: Add `action` option to allow remove/pause/resume of loaded torrents
[change] deluge: Add underscores between words in multi-word options

# Conflicts:
#	flexget/_version.py

…h file

…re already complete when added to transmission

- Minor cleanups

…fix #2417

Clean up the strip_dates handling some.

…all for debugging.

…uge settings. fix #2419

…fter one fails. ref #2406

[change] Add pagination headers to history api even if no items are present