Continue construction of bin/celerity map

Summary: Ref T4222. Continues porting scripts/celerity_mapper.php functionality into bin/celerity map. This is pretty much a 1:1 port with no functional changes, but hopefully the code is a little better factored. Particularly, more responsibilities are pluggalbe through CelerityResources now.

Test Plan: Ran bin/celerity map and inexpected the var_dump() output, which appeared to make sense.

Reviewers: btrahan, hach-que

Reviewed By: hach-que

CC: aran

Maniphest Tasks: T4222

Differential Revision: https://secure.phabricator.com/D7865