128 charting library removal

[sschiessl-bcp]

General

Closes #2826

1. Created script (npm run package-charting-library) that archives the source code content of the charting_library folder into one file (content as it is right now, .zip or .tar or whatever is easiest, I don't want many additional dependencies, and all dependencies should be devDependencies) and writes the .md5 file for the archive
2. Create script (npm run install-charting-library) that
   downloads the previously packaged file from an external URLhttps://bitshares.org/assets/charting_library.zip
   verifies the downloaded file against the .md5 file checksum
   unpacks it such that the charting_library folder is fully restored locally
3. Deleted source code within the charting_library folder
4. Added postinstall script to npm to set up charting library from remote assets

General

Please make sure the following is done:

• Pull request is onto develop
• If you haven't already, have a look at
  • https://github.com/bitshares/bitshares-ui/blob/develop/CODE_OF_CONDUCT.md
  • https://github.com/bitshares/bitshares-ui/blob/develop/CONTRIBUTING.md

Code Preparation

Please review all your changes one last time before committing

• Check for unused code
• No unrelated changes are included
• None of the changed files are reformatting only
• Code is self explanatory or documented
• All written text is properly translated (english language)

Testing

The branch has been tested on the following browsers (desktop and mobile view)

• Chrome
• Opera
• Firefox
• Safari

User interface changes

Delete this section if there weren't any UI changes. Please make sure you tested your changes in all themes

• Dark
• Light
• Midnight

Please provide screenshots/licecap of your changes below