v3.4

Changes

• #84 Reference pages: exceptions of the bundle.

Fixes

• #75 FileFetchTask (flysystem_file_fetch): an unknown storage fails at initialization with an explicit message (Unknown storage "…" (option "…"), with the known storages) instead of Service "…" not found, When the task is executed after a failed initialization (process-bundle v5 goes on), it fails with an explicit message instead of Typed property … must not be accessed before initialization. Update documentation, add tests.