Samples with only a closing bracket set the first year to the first year of the data set instead of 0
Merge branch 'master' into issue6
Added some error checking, but it needs to be shown to the user
Merge branch 'master' into issue6
Added a file error panel, but it isnt used yet
Added some error messages for erroneous files
Added more error messages, refactoring
Merge pull request #23 from purpleplatypus/issue6

Fixing issue #6