Revert "l2 max norm"

This reverts commit 0fd3230180c5bfd584e9a97955bcf6abfed2ebfd.
Revert "x"

This reverts commit 2a96c4b4a1e8406f67fcb399459eff29d0060c99.
Revert "fix chunikfy"

This reverts commit b89f38b6640c127060e9cba7f7b3d8be654fb72c.
Revert "update example"

This reverts commit 144ffa59c9c50019f4132f57d393f90c99dbb753.
Revert "minimize data transfer of minibatches"

This reverts commit fcbbf9f20bbff1d5ec9542ae1864fe80b0eb1eb0.
Revert "remove learningRate from nn. Variable momentum and learning rate is now required"

This reverts commit 436d3e0c379f9b9df1a54dda506caec64ad319f7.