PSync

Still work in progress:
https://gerrit.named-data.net/#/c/PSync/+/4824/

But reviewers may start reviewing iblt, logic base, logic consumer, bloom filter.
Any review is greatly appreciated.

To do:
Add .jenkins.d; bloom filters code style, doxygen, and maybe more unit tests; Authors; etc.

After this change is merged, in the next change (under same issue) I will add logic full and logic partial.

Partial sync part is ready to review:
https://gerrit.named-data.net/#/c/PSync/+/4834/

Full sync is work in progress - need to complete unit tests and clean up:
https://gerrit.named-data.net/#/c/PSync/+/4839/

All three changes are ready to review.

https://gerrit.named-data.net/#/c/PSync/+/4824/