bcg: gateway: use Python's built-in json library

[commodo]

This reduces the dependency list by one, since Python has a built-in JSON
library with the same API.

Fixes #16

Signed-off-by: Alexandru Ardelean ardeleanalex@gmail.com

[commodo]

i've not tested this, but from a high-level perspective it looks correct;

i just wanted to sort of ping / re-kick the discussion from #16
and i thought of doing it in the form of a PR

[blavka]

Hi,
we're using simplejson because the standard library didn't work well with the decimal type

bch-gateway/bcg/gateway.py

Line 109 in 603a826

talk = json.loads(line, parse_float=decimal.Decimal)

But it's been a long time since we've done it, it's still been for python2.7 and it's stayed that way.

[blavka]

I see that shouldn't be a problem anymore.

[commodo]

oh, thank you for taking the patch

i was hoping for a bit more discussion, since i don't want to break anything and i didn't test anything :)

but if you're fine with this, then it's super for me;
i can try to remove the simplejson package from OpenWrt :)

thank you :)

[blavka]

I haven't done a release yet, I want to test the behavior, but it's true that with python3.x it was an unnecessary addiction.