Minor changes
add mvc for isSampleBased
Refactor constructor of Step2Panel
minor changes
add mvc for sampleStartRegEx
add mvc for dateOffset
add mvc for sampleDateExtractionRegEx
Fix wrong term in release notes and configuration.xsd
add mvc for datePattern
Add check for regEx group in date extraction regEx
Remove useless parameter as value is available via field
add mvc for sampleDataOffset
add mvc for sampleSizeOffset
Fix issue with multi line tooltips
add mvc for sampleSizeRegEx
Merge pull request #23 from EHJ-52n/feature/gui-support-for-sample-based-files

Feature/gui support for sample based files

Fixes 52North/sos-importer#21 and 52North/sos-importer#16 to some extent