Update field name to match the proposed filerepoinfo API.

Current filerepoinfo patch: https://gerrit.wikimedia.org/r/96568

Change-Id: I562ebfd4a79f8fcbf37702040808eaa0949c18ad
Generate the nfo.json file from metabook.json.

The nfo.json file is no longer an input.  metabook.json is the only input
required to drive the bundler.

Change-Id: Ic451e80e60ee0a1c14bad6faf4c0fc6dd77f5ff6
Add --debug option to CLI.

Change-Id: Ia83510609fd9e901e53093cc4d339307d84ef740
Revert "Check out OCG/node_modules as a git submodule."

This reverts commit 27ae9fcbf44cef26d50e971bf5510c16814a9530.

Let's have Jenkins check out node_modules instead.

Change-Id: Iadd7588e31a383759bb8114aada82087a02bd87e
Merge "Revert "Check out OCG/node_modules as a git submodule.""
Merge "Generate the nfo.json file from metabook.json."
Merge "Add --debug option to CLI."
Add travis test runner; add test case; update dependencies.

Change-Id: If7314a4db3f1c212ad1ccc7f60fc3df111c4b5ea