(Dynamically) Retrieve Caffe Layers and their arguments

[TimZaman]

The layers and their args should preferably be formatted to .json.

Listing Caffe Layers

• Through python and Expose LayerFactory::LayerTypeList in pycaffe BVLC/caffe#2930 (from Listing all layers facebookarchive/caffe2#42 (comment)); Example .json output: https://github.com/TimZaman/dagstudio/blob/master/tests/caffe-all-layers.json

Listing Caffe args

• By protobuf introspection, f.e. https://developers.google.com/protocol-buffers/docs/reference/python/google.protobuf.descriptor-module from (Listing all layers facebookarchive/caffe2#42 (comment))
• By parsing the .proto with Extended support for floating point defaults, empty defaults and tests. nlf/node-proto2json#1 ;
  Example .json output: https://github.com/TimZaman/dagstudio/blob/master/tests/caffe.json