wrong custom opoioid dilution validation

corrects the wrong opioid custom dilution validation script, which erroneously resets the opioid conc (e.g. remifentanil defaults to 20) because of statements falling outside of bracket in if-then condition

Merge pull request #24 from luktinghin/luktinghin-patch-1

Update README.md

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minor update css dual mode

fix dual mode interface bug numpad

Update README.md

Update README.md