Remove @KSid from contrib maintainers for now

His availability has been very limited, so I'll take over completely for the short term until he can find more time to help out.
Merge pull request #2218 from tianon/ksid

Remove @KSid from contrib maintainers for now
Don't escape JSON strings when logging to JSON, embed them instead

This fixes a bug in docker where logs shipped to
/var/lib/containers/id/id-json.log would have JSON-formatted
STDOUT/STDERR escaped instead of embedding it directly.

This fixes that by utilising an interface{} for the JSONLog struct
instead of relying on a raw string.
Add Kushal Pisavadia to AUTHORS file