Feature/ndeximport cj

[d2fong]

Adding Import/Export to NDEx functionality to Cytoscape Explore

Summary of main changes

• adds NDEX specific config variables to .env
• adds a Export to NDEx button in the debug menu
• adds a Import Network From NDEx button in the debug menu
• implements the model/import-export/cx module that handles CX conversion to CE's data model and conversion from the CE data model to CX
  • adds some tests that compares the CX2 output vs the CE data model JSON from the exportCX2 function

Controversial changes

These are changes that we would like feedback on. I will start comment threads at the particular lines so you can easily find them.

• We nedded to create a new function in the node server api called postCX2Network.
• I registered the exportJSON, importJSON, importCX and exportCX functions as Cytoscape.js extensions in the cy-extensions.js file because it made it easier for me to make tests.

[d2fong]

Tests failing because there are 3 new visual properties to support

[maxkfranz]

Tests failing because there are 3 new visual properties to support

Could these be made into something like TODO comments instead of failing tests? The main value of the tests for PRs is to confirm that they're green in order to merge. If we merge this in, everyone else's PRs would be red no matter whether their changes broken things or not

[d2fong]

Tests failing because there are 3 new visual properties to support

Could these be made into something like TODO comments instead of failing tests? The main value of the tests for PRs is to confirm that they're green in order to merge. If we merge this in, everyone else's PRs would be red no matter whether their changes broken things or not

Yeah I am putting in a temporary fix to just ignore the new properties for now when dealing with cx import/export. @jingjingbic and I will add support for these new properties alongside the updated tests in a new branch. Is that ok?

[maxkfranz]

I've responded to the initial comments. I'll take a deeper look tomorrow