[Bugfix] Bug #260. Authoring: 1 BCE is presented as 0 BCE in Item form.
Merge pull request #644 from alex-zen/bugfix260

[Bugfix] Bug #260. Authoring: 1 BCE is presented as 0 BCE in Item form.
Merge pull request #639 from a-chumagin/master

Unittests: fix paths for test timeSeriesSpec
Fix dataPicker unit tests