(maint) Update gitignore

This commit updates the gitignore file to account for the most common
files ignored in Puppet modules

Author: jpogran

.gitignore

@@ -1,3 +1,22 @@
+*.iml
+.*.sw[op]
+.DS_Store
+.bundle/
+.idea/
+.metadata
+.vagrant/
+.yardoc
+.yardwarns
+Gemfile.local
 Gemfile.lock
-spec/fixtures/modules
-pkg/
+bin/
+coverage/
+doc/
+junit/
+log/
+pkg/
+spec/fixtures/manifests/
+spec/fixtures/modules/
+tmp/
+vendor/
+