Update ignored files

.gitignore

@@ -1,17 +1,15 @@
-*.gem
-*.rbc
-.bundle
-.config
-.yardoc
-Gemfile.lock
-InstalledFiles
-_yardoc
-coverage
-doc/
-lib/bundler/man
-pkg
-rdoc
-spec/reports
-test/tmp
-test/version_tmp
-tmp
+# See http://help.github.com/ignore-files/ for more about ignoring files.
+#
+# If you find yourself ignoring temporary files generated by your text editor
+# or operating system, you probably want to add a global ignore instead:
+#   git config --global core.excludesfile ~/.gitignore_global
+
+# Ignore bundler config
+/.bundle
+
+# Ignore the default SQLite database.
+/db/*.sqlite3
+
+# Ignore all logfiles and tempfiles.
+/log/*.log
+/tmp