Support `console.log`

[tbosch]

This should result in a print statement in Dart with interpolation. E.g.

console.log('Name:', name)

Should be transpiled into

print(`Name: ${name}`);

[jacob314]

dart:html could be easily updated to allow logging multiple arguments. then the transformation would just need to be console.log('Name:', name) to window.console.log('Name:', name)