Replace Armlet with MythXJS

[blitz-1306]

Tasks

• resolves Refactor sabre to use mythxjs instead of Armlet #69

Status

Stable. Review will be appreciated.

Changes

• Removed Armlet dependency.
• Added MythXJS dependency.
• Overhauled lib/client.js to use MythXJS instead of Armlet:
  • getRequestData() now completely controls analysis data arranging process (that was partial due to Armlet's older interface).
  • getMythXReport() is async now because must control a lot of asynchronous remote actions, provided by MythXJS.
• Minor fixes in sabre.js:
  • Implemented --version CLI option/switch.
  • Implemented --help CLI option/switch.
  • Added v-spaces between some constructs for clarity.
  • Switched arguments for getRequestData() and getMythXReport().
  • Renamed mythxSpinner to analysisSpinner.
  • Other minor stuff.

Notes

• No error handling to refresh JWT tokens yet. It is a question if this logic is needed in case of short-term analyses.
• MythxJS is not yet supporting --noCacheLookup parameter, so it will need additional fix. I've created a PR for it: Add support for noCacheLookup API parameter Consensys/mythxjs#24. When it will be merged, we will need to recheck current behavior.
• Polling mechanic is borrowed from Armlet and optimized little bit.
• This PR is heavily relying on async / await.

Regards, @blitz-1306.