Fixed SELinux modifications for Apache

The boolean httpd_enable_homedirs isn't needed. httpd_read_user_content is enough (http://serverfault.com/a/461738).
All file context rules can be applied in one transaction (http://danwalsh.livejournal.com/41593.html).
Merge pull request #201 from skarllot/master

Fixed SELinux modifications for Apache