* add --only-hash flag

* skeleton http option passing, checkpoint commit to check some broken tests.

* deep logging for debugging. Checkpoint

* found the levledown problem! line endings!

* add only-hash as a qs option for the send-files-stream. Also added some tests to help me figure that out

* update --only-hash test, increase timeout for the afterAll hook. I think it takes longer because the --only-hash test leaves an unresolved ipfs.ls command. Would love to be able to cancel it :)

* ipfs-exec/ipfs.fail should throw on a non-failing command && use random file for ipfs add --only-hash test.

* fix an ipfs config test.

* lint

* clean: move test/http-api/extra/files.js to test/http-api/files.js

…est.