Docs: Add Contributor Model (fixes #1341)
Merge pull request #1342 from eslint/contributor-model

Docs: Add Contributor Model (fixes #1341)
Update: turn on comma-style for project (fixes #1316)
Update: Add CLIEngine#getConfigForFile (fixes #1309)
Docs: Add recommended keywords for plugins (fixes #1248)
Docs: Add docs on Node.js API (fixes #1247)
Docs: Explain global vs. local plugins (fixes #1238)
Merge remote-tracking branch 'upstream/master'