01 - update General Information to hide DRS lines in report when disabled.ps1

This update hides the DRS lines in the report when the corresponding "days of DRS Migrations to report on" is set to 0. It also hides the Storage DRS report line when its reporting duration is set to 0. This helps simplify the report in smaller sites where DRS isn't licensed for use.

Before:
![image](https://f.cloud.github.com/assets/4061075/1132731/ab18b6dc-1bd0-11e3-8b11-488531c52430.png)

After:
![image](https://f.cloud.github.com/assets/4061075/1132733/af4cd71a-1bd0-11e3-9f0f-8ad8fade9b7a.png)