Moving some rails and osx-specific functions to their corresponding plugin files

plugins/osx.plugin.zsh

@@ -0,0 +1,11 @@
+function tab() {
+  osascript 2>/dev/null <<EOF
+    tell application "System Events"
+      tell process "Terminal" to keystroke "t" using command down
+    end
+    tell application "Terminal"
+      activate
+      do script with command "cd \"$PWD\"; $*" in window 1
+    end tell
+EOF
+}