Add IOS samples

[AbbyGi]

From an email from @irawaluyo:

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Energy scans (99% of our important data) covering various energy ranges. These are very old data from real samples. Either they’ve been published or will never be, so it should be OK to share publicly.

2108, 2139, 2146, 2156, 2187, 2243, 2255

Sample position scan:

19425

EPU scans:

19860, 19868

Photodiode scans:

19824, 19861