Use rbenv-gemset to avoid messing up system gems during development

.gitignore

+!/spec/integration/*/log/.gitkeep
+!/spec/integration/*/tmp/.gitkeep
+*.gem
 .DS_Store
+.bundle
+.gems
+.rbenv-version
+/.idea/
+/.rbx
+/.rvmrc
 /.yardoc/*
-/doc/*
+/Gemfile.lock
 /coverage/*
-/spec/debug.log
-/pkg/*
 /dist
-/Gemfile.lock
-*.gem
-/.idea/
-/.rvmrc
-.bundle
-/.rbx
+/doc/*
+/pkg/*
+/spec/debug.log
 /spec/integration/*/bin/
+/spec/integration/*/db/test.*
 /spec/integration/*/log/*
-!/spec/integration/*/log/.gitkeep
 /spec/integration/*/tmp/*
-!/spec/integration/*/tmp/.gitkeep
-/spec/integration/*/db/test.*
-.rbenv-version
\ No newline at end of file

.rbenv-gemsets

+.gems