"Unknown JSON error"

[baschny]

I get lots of "Unknown JSON error: 5". Why not handle all the potential PHP json decoding errors in handleJsonError and display the real error instead? Only 1,2,3 seem to be handled currently, while others were added in newer PHP versions.

See potential errors here: http://php.net/manual/en/function.json-last-error.php

Or use http://php.net/manual/en/function.json-last-error-msg.php (for PHP >5.5).

[bshaffer]

fixed in #110