Adding six new dependencies for current php cookbook

The php cookbook that is installed in Chapter 1 has added three new dependencies: yum-epel (which itself has a dependency of yum), windows (which has dependencies chef_handler and powershell), and iis.
simplifying php cookbook dependencies installations

* format now matches the installation of the 'database' cookbook later in the chapter
Merge pull request #16 from hwork/new_php_dependencies

Adding six new dependencies for current php cookbook