.gitignore in billomat-0.2.0 vs .gitignore in billomat-0.3.0

@@ -1,12 +1,17 @@
 /.bundle/
 /.yardoc
 /Gemfile.lock
 /_yardoc/
 /coverage/
+/doc/api/
 /pkg/
 /spec/reports/
 /tmp/
+/vendor/
+/gemfiles/vendor/
+/Gemfile.lock
+*.gemfile.lock
 
 billomat*.gem
 
 # rspec failure tracking
 .rspec_status