Merge branch 'hotfix/published-chart-language'
fixed wrong hook name

In b90e4f5635a1678f036e57ce941a6176ad7849d0, the "after_core_body" hook has been introduced,
in alignment with the "after_chart_body" hook, which already existed. Shortly after, in
59579bc6d9f5ed3fcb86e7f2585e807f419da19d, the hooks have been renamed to follow the
*_after_body pattern, but the reference in this template was left over.

To stay compatible with existing code, we now run both hooks in succession. In 2.x, the wrong
one will be removed.
Merge branch 'hotfix/after_body' into develop
updated analytics plugin
Merge branch 'develop' into reorganize
removed compatibility hook
more adjustments to 2.0 API
now that plugins need an app to init themselves, the plugin.php should create one as well
adjusted the rest of the distributed plugins to the new init() signature
removed alias classes, as it's now not really possible to run 1.x plugins without minor modifications anyway

If we really want to provide code to ease migrations, we can create a new 1xcompat plugin.