Collective.mailchimp

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Bugfixes:

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Bugfixes:

- Add upgrade step to reload new src folder. Make sure you run the upgrade step, otherwise the add-on will not work properly. This fixes https://github.com/collective/collective.mailchimp/issues/21.
[timo]

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- Move code to src folder to follow best practice.
[timo]

- Set default value for interests to '{}' instead of None. This fixes https://github.com/collective/collective.mailchimp/issues/19.
[timo]

- Added support for Plone 5, kept 4.3 compatibility.
[jladage, didrix, maurits]

- Updated to version 3.0 of the mailchimp api. The data that we get
from mailchimp with this api version is changed. When you have
interest groups in your lists, and you do not see them anymore on
the subscribe form, you should visit the control panel again. This
will update the data automatically.
[jladage, didrix, maurits]

- Remove bare excepts.
[timo]

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- Try to avoid some needless registry updates.
[maurits]

- Disable inline validation in the mailchimp control panel. It may
change the cache based on a new api key that the user has not yet
saved.
[maurits]

- Remove mailchimp object before updating cache. Otherwise a change
in the api key is not picked up until after a restart.
[maurits]

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- Fix invalid pypi classifier.
[timo]

- Show control panel even when api key is invalid.
Fixes issue 8.
[maurits]

- Fix fallback for missing cache after startup.
[pbauer]

- Add italian translation.
[gborelli]

- Fix UnicodeEncodeError
[pbauer]

- Add persistent cache in the registry for the connection.
[toutpt]

- Add french translations
[toutpt]

- Add brazilian translation.
[cleberjsantos]

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- Fix broken group subscription which has been introduced in 1.3.0.
[timo]