console.log('error parsing json data');

[alanclarke]

@fleon, @chinchang, what would be a good alternative to this?

issues:

• we can't rely on console in earlier versions of ie, e.g. ie8.
• some test suites, e.g. mocha with karma use postMessage - causing the test logs to be polluted with this error message whenever they post a string
• more generally, it is difficult to encapsulate please in large hostile application environments from postMessages being sent and received elsewhere using other means

it may be a good idea to include a signature in requests to distinguish postMessages made using please?
at the very least i suggest we make this logging optional?