Merge branch 'refs/heads/master' into ssdm-13579-dss-widget

...src/main/java/ch/ethz/sis/afsclient/client/AfsClient.java

...-server-javascript/src/js/api/server-data-store-facade.js

api-openbis-javascript/src/v3/openbis.js

...umentation/development-environment/system-requirements.md

...ric/server/asapi/v3/TransactionCoordinatorJsonServer.java

...ric/server/asapi/v3/executor/exporter/ExportExecutor.java

...server/asapi/v3/executor/exporter/ExportExecutorTest.java

...a/ch/ethz/sis/openbis/systemtest/asapi/v3/ExportData.java

...a/ch/ethz/sis/openbis/systemtest/asapi/v3/ExportTest.java

.../export/export-experiment-data-compatible-with-import.zip

...est/asapi/v3/test_files/export/export-experiment-data.zip

...files/export/export-sample-all-compatible-with-import.zip

...stemtest/asapi/v3/test_files/export/export-sample-all.zip

...iles/export/export-sample-data-compatible-with-import.zip

...temtest/asapi/v3/test_files/export/export-sample-data.zip

...ims/1/dss/drop-boxes/eln-lims-dropbox/eln-lims-dropbox.py