v0.1.1 — Packaging fix

Fixed

• Critical packaging bug. lib/rails-api-docs/doc/ files
  (curl_renderer, renderer, responder, file_builder) were
  silently excluded from the 0.1.0 release because the doc/ pattern
  in .gitignore matched any doc/ directory at any depth, not
  just the repository root. Installing 0.1.0 produced
  cannot load such file -- …/lib/rails-api-docs/doc/curl_renderer
  at boot. Tightened the gitignore pattern to /doc/ so it only
  ignores the top-level doc/ directory (RDoc/YARD output). 0.1.0 has
  been yanked from RubyGems.