Update Rails.gitignore

A more similar file compered to the .gitignore generated by rails

Rails.gitignore

@@ -1,17 +1,45 @@
-*.rbc
-*.sassc
-.sass-cache
-capybara-*.html
-.rspec
-.rvmrc
+# 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
 /vendor/bundle
-/log/*
-/tmp/*
+
+# Ignore the default SQLite database.
 /db/*.sqlite3
-/public/system/*
-/coverage/
+
+# Ignore all logfiles and tempfiles.
+/log/*.log
+/tmp
+
+# ignore database config
+/config/database.yml
+
+# ignore default test folder
+/test
+
+# other test files
+capybara-*.html
+.rspec
 /spec/tmp/*
+
+# ignore precompiled files
+/public/assets
+/public/system/*
+
+# ignore rvmrc
+.rvmrc
+
+# Sass CSS extension
+*.sassc
+.sass-cache
+
+# others
+*.rbc
+/coverage/
 **.orig
 rerun.txt
 pickle-email-*.html