DICOM Query-Retrieve and Echo for remote servers uses default 'from' AET

[Ed McDonagh]

Need to define the OpenREM AET to use for any particular QR node, as some will provide or prevent access on this basis.

Might be the same as the OpenREM Store node AET, but not necessarily

[Ed McDonagh]

Added callingaet to remote QR node model. Refs #300

→ <<cset 9d5e0d835cb6>>

[Ed McDonagh]

Adding the callingaet field into the migration file. Refs #300

→ <<cset a3e82dc7f670>>

[Ed McDonagh]

Replaced fixed calling AET with the one stored in the DicomRemoteQR table. Refs #300

→ <<cset ad8b13f6e14e>>

[Ed McDonagh]

Removing b7 to b8 migration file as it is not necessary - django can do it automatically. Refs #300

→ <<cset 8f9f9d07245e>>

[Ed McDonagh]

Adding changes to changes and CHANGES. Refs #300

→ <<cset 9015c3cd88c5>>

[Ed McDonagh]

Changed Remote QR node configuration to use Crispy Forms. Also updated the delete node template with the current model fields. Refs #300

→ <<cset 2c18114454d3>>

[Ed McDonagh]

Remote QR node echo and move now uses configured calling AET. Also made it look nicer. Fixes #300

→ <<cset 49d4c6c46285>>