Add Cache settings without mod_expires.

When mod_expires mod is disabled on Apache server nothing control Cache.
![original_htaccess](https://f.cloud.github.com/assets/3920304/280871/70b92618-9168-11e2-9334-83dab5c6c403.jpg)

Now it works.
![mod_expires_off](https://f.cloud.github.com/assets/3920304/280872/7677cbea-9168-11e2-8f08-500b12ff3208.jpg)

![mod_expires_on](https://f.cloud.github.com/assets/3920304/280875/7b9878d6-9168-11e2-9998-0a5e73af2bde.jpg)