Yan 1070 - add data_hash and signature attributes from BlockDAG to EAGLE palette JSON

[james-strauss-uwa]

Add data_hash and signature data generated by BlockDAG module into palettes JSON. I use build_block_dag() to generate data for the palette that is being built. It largely follows the example use of build_block_dag() from within the BlockDAG code.

From the BlockDAG data:

• the "data_hash" attributes are copied to each component in the palette (as the attribute "dataHash")
• the "signature" attribute for the whole set of components is copied into the palette (as the attribute "signature")

The additional information will be used in EAGLE to update components within existing graphs.

I'll create a PR for the associated EAGLE work soon.

[coveralls]

Coverage decreased (-0.2%) to 82.471% when pulling 76c56bc on yan-1070 into 28cd9d8 on master.

[pritchardn]

This looks pretty good to me. Pulls the right info out from the BlockDAG stuff and it would be easy to add more fields which is handy.