Support log to JavaScript Console

[tszming]

I've made some changes in the script to support logging directly to the JS console (support log level & native JavaScript datatype), if you are ok with this I can send you a pull request.

tszming@4f37279

[gvalkov]

Hello tszming,

Thanks for the effort. I would like to get some changes in before considering your feature. Namely, I would like to have a configuration menu through which options of this type can be set (the a.action-configure is for this).

I haven't had a lot of time to maintain my oss projects lately, so it might take me a while.

Regards,
Georgi