Merge branch 'check_negatives' into 'NIFTy_5'

Check for negative number of pixels or negative binbounds

See merge request !335
11 jobs for NIFTy_5 in 23 minutes and 1 second (queued for 3 seconds)
Status Job ID Name Coverage
  Build Docker
passed #895873
build_docker_from_scratch

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  Test
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test_mpi

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test_serial

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81.0%
 
  Release
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pages

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  Demo Runs
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run_bernoulli

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run_curve_fitting

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run_getting_started_1

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run_getting_started_2

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run_getting_started_3

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run_ipynb

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  Deploy
passed pages:deploy

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