WIP: Rework Bags into Bags Examples directories

[ross-spencer]

Adopting a similar pattern to other samples grouping by function, this creates greater distinction between bag transfers, e.g.:

SampleTransfers/BagExamples$ $ tree -d
.
├── TarGzBags
├── UnzippedBags
│   ├── BaggedDemoTransferCSV
│   │   ├── data
│   │   │   └── artwork
│   │   └── metadata
│   │       └── submissionDocumentation
│   ├── BagTransfer
│   │   └── data
│   │       └── bagTest
│   ├── SimpleBagWithProcessingMCP
│   │   └── data
│   └── UnzippedBag
│       └── data
└── ZippedBags

NB. May currently break AMAUAT without #67

New transfers

• You will see that I have also added a transfer which adds descriptive and rights metadata to a bag so that can be tested during regression testing easier, and to support a future AMAUAT.
• I have also added tar.gz examples.
• We can create a processingMCP in Archivematica with zero-decision points resolved. I have included this in each of the samples so that the preservation of the processing MCP in zip-like transfers can be observed.

Connected to archivematica/Issues#771
Connected to archivematica/Issues#851
Needed by #67

TODO (for another PR another day?)

This could greatly benefit from a makefile. BUT! Creating tar.gz from a script is an incredible art and I have not yet learned it well.