Delete _site and added gitignore

Author: agarnung

.gitignore

@@ -0,0 +1,13 @@
+# Local Site Directories
+_site/
+.sass-cache/
+.jekyll-cache/
+.jekyll-metadata
+
+# Ruby Gems
+.bundle
+Gemfile.lock
+*.gem
+
+# Log Files
+*.log