Remove conquest documentation

[Ed McDonagh]

For ease of maintaining the documentation, I am going to remove the Conquest documentation instead of trying to update that and maintain it alongside the Orthanc configuration. Doesn’t mean that Conquest can’t be used, but the user will need to work it out for themselves.

[Ed McDonagh]

Removing Conquest documentation. Removed Orthanc config that is now in install docs. Refs #950 [skip ci] docs only

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[Ed McDonagh]

Adding ref #950 to docs [skip ci] docs only

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[Ed McDonagh]

Merged in issue950removeconquest (pull request #529)

Fixes #950

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