Issue #36 - add approx price

[inkredabull]

#36

Checklist:

• Test your work and double check you didn't break anything
• Update any relevant READMEs and docs

Description:

Added approximate price to UI using Cryptonator.

[inkredabull]

Ugh; won't get to the resolution of these conflicts today - will have to be on Monday.

[inkredabull]

Now getting the following when running npm run test:

 Requires Babel "^7.0.0-0", but was loaded with "6.26.3". If you are sure you have a compatible version of @babel/core, it is likely that something in your build process is loading the wrong version. Inspect the stack trace of this error to look for the first entry that doesn't mention "@babel/core" or "babel-core" to see what is calling Babel.

Need to investigate.

[inkredabull]

webpack/webpack-cli#296