Change text from "Scanner" to "System name" in the summary tables on the home page

[David Platten]

The word "Scanner" is used for all of the modality tables, even though it isn't really the correct word for most of the tables. I'd like to suggest it's changed to "System name".

[David Platten]

Changed name of summary table column heading to use more general wording. Also altered the second column heading. References issue #663

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[David Platten]

Changed images to figures in the navigation document as they were appearing squashed on my screen. References issue #663

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[David Platten]

Updated Home.png to reflect changes to column titles. Doc changes only [skip ci].References issue #663

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[David Platten]

Fixing conflicts. References issue #663

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[David Platten]

Cropped Arabic(?) text from image as I don't know if it contains a real hospital name. References issue #663

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[Ed McDonagh]

Good thinking, but there was no need! It's from one of my test files, all of which have made up names in. The different scripts are there as part of the non-ASCII tests.

[Ed McDonagh]

Reminded myself via google translate: Hospital One, in Arabic.

[Ed McDonagh]

Merged in issue663changeSummaryColumnHeading (pull request #218)

Changed name of summary table column heading to use more general wording. Also altered the second column heading. Fixes issue #663

Approved-by: Ed McDonagh [e-mail]

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[Luuk]

Changed name of summary table column heading to use more general wording. Also altered the second column heading. References issue #663

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[Luuk]

Changed images to figures in the navigation document as they were appearing squashed on my screen. References issue #663

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[Luuk]

Updated Home.png to reflect changes to column titles. Doc changes only [skip ci].References issue #663

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[Luuk]

Cropped Arabic(?) text from image as I don't know if it contains a real hospital name. References issue #663

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