Replace customer specific logo with an opengever logo.
Switch og.ogds.models to master after merging `rework-mandanten-concept` branch.
Merge pull request #550 from 4teamwork/lg-switch-ogds-models-to-master

Switch og.ogds.models to master after merging `rework-mandanten-concept`branch.
Revert "Drop latex listing adapters in favour of good old basic classes."

This reverts commit abbf657af675194370d4e79caab6b02ec71670a2.

Conflicts:
	opengever/latex/listing.py
Merge pull request #549 from 4teamwork/deif-gever-pdf-logo

Replace customer specific logo with an opengever logo.
Merge pull request #553 from 4teamwork/pg_readd_latex_listing_adapters

Revert "Drop latex listing adapters in favour of good old basic classes....
Task transporter tests: Commit pending transaction in order to avoid

StorageTransactionError: Duplicate tpc_begin calls for same transaction.
See https://github.com/4teamwork/opengever.core/pull/556
Merge pull request #556 from 4teamwork/lg-avoid-duplicate_tpc_begin_calls_for_same_transaction

Task transporter tests: Commit pending transaction in order to avoid StorageTransactionError
Update doc-properties when moving/copying documents.
Update DocProperties after document checkin/checkout.
Create journal entry when updating/adding doc properties.
Remove duplicate readme entries, improve readability.
Update history.