publishing to nexus repo

Summary: Forked finagle-aws and added publishing build artifacts to thefactory nexus repo

Test Plan: manual

Reviewers: tberman, jyeo, peter, justin, jimmy

Reviewed By: tberman

Differential Revision: http://phabricator.thefactory.com/D352
added opetional tctConnectionTimeout to S3 ClientBuilder

Summary:
Finagle defualt tcp connection timeouts seem to be too small for S3 calls. Changed S3 client to take an optional
connection timeout and set default to 1sec.

Test Plan: manual

Reviewers: tberman, jyeo, peter

CC: jimmy, justin

Differential Revision: http://phabricator.thefactory.com/D354
change based on review comment