Enable weekly, monthly, quarterly and yearly retention schema#9

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andresch wants to merge 5 commits intoadlibre:masterfrom

andresch:master

Commits on Apr 21, 2015

Enable weekly, monthly, quarterly and yearly retention schema
andresch
committed

Commits on Apr 22, 2015

Some enhancements, esp. for retention policies
andresch
committed

Commits on Sep 4, 2016