Move idle, external, and similar features elsewhere

[ederag]

"External" was never brought back (#271),
and notifications are not working at all (tested on openSUSE 15.1).
There have been related feature requests (#123) and PRs (#118, #259) pending for a long time.

No wonder:
that kind of features is nice to have, but hard to test,
and increase a lot the maintenance burden and responsibility.

All these features can be implemented separately,
talking to the main hamster through dbus, for instance.

Let's remove them from the main repo,
and if there is an interest, eventually delegate that to a new separate project
(say hamster-companion), preferably with another maintainer.
[I would gladly help to set it up, of course, so please ask here]

That would even be reusable with the rewrite if it resumes.

[ederag]

Removal part done in #494.
Leaving open as an advertisement for the revival part (need help).

[ederag]

For JIRA and Redmine integration, hamster-bridge already exists and looks good !
@kraiz the DBus interface is intended to be stable, but we can discuss improvements.

[sh-zam]

As a user of this, I will try to fix it :-)

Starting with: notifications are not working

[ederag]

@sh-zam that would be good !
In addition to the removed files listed in the PR #494 head comment,
here are some pointers about notifications:
https://wiki.gnome.org/HowDoI/GNotification
https://github.com/projecthamster/unity-indicator/blob/master/hamster-indicator

[sh-zam]

Follow up from: PR #521

If I understand you correctly, you want the notifications to be managed separately (like in a separate service) and it should talk to hamster-service and client over dbus?

[ederag]

Exactly.
These features are hard to test, and will need a faster development/review pace, too much for me.
Not to mention this wise recommendation from @tstriker himself.

As stated above, this is how hamster-bridge works.
@kraiz, @mkorvas, could notifications (PR #521) be added to hamster-bridge e.g. as a listener ?

[sh-zam]

Makes sense.

If the repository is fit for hamster-bridge, I'll add it to that.
If not, I'll create a new one for notifications and few other features, I'd love to have :-)