Release 2.1.1

Added

• Added nengo_dl.obj as a shortcut alias for nengo_dl.objectives.
• Added tutorial for Nengo users coming to NengoDL
• Added tutorial for TensorFlow users coming to NengoDL

Changed

• Increased minimum progressbar2 version to 3.39.0.
• We now only provide sdist releases, not bdist_wheel. Due to the way the TensorFlow packages are organized, bdist_wheel forces any existing TensorFlow installations (e.g. tensorflow-gpu or tf-nightly) to be overwritten by tensorflow, which we don't want to do.

Removed

• Removed the nef-init tutorial (replaced by the new from-nengo tutorial).