0.2.3

🐛 Bug Fix

• Remove last traces of datalad.metadata #65 (@christian-monch)
• Add metadata code that is removed from core #63 (@christian-monch @mih)
• BF: do not install devel datalad (pytest-ed now) for devel -- released is ok now #60 (@yarikoptic)

⚠️ Pushed to master

• DOC: Set language in Sphinx config to en (@adswa)

🧪 Tests

• RF: migrate from using nose for testing to pytest #51 (@yarikoptic)
• Update Appveyor config to use new codecov uploader #58 (@jwodder)

Authors: 5

• Adina Wagner (@adswa)
• Christian Mönch (@christian-monch)
• John T. Wodder II (@jwodder)
• Michael Hanke (@mih)
• Yaroslav Halchenko (@yarikoptic)