openscholar/openscholar — pull request #6312 by ran81 (2014-07-01 07:41:28+00:00)
Title: Allow empty year value in class CSV import.

#5761

Now a blank year value in the class CSV file is possible:
![selection_306](https://cloud.githubusercontent.com/assets/4497748/3440128/161c4c02-00f3-11e4-9467-294c09daddd6.png)