Add keyspec support to `fromjsonarray`.
Add new `fromapache` and `fromxferlog` operation.
Fix option specs of recs-fromapache.
Merge pull request #40 from b4hand/jsonarray-key-spec

Add keyspec support to `fromjsonarray`.
Merge pull request #41 from bokutin/people/bokutin/recs-fromapache

Add new `fromapache` and `fromxferlog` operation.