Readme Refinement - Magento Admin Location Addition

[Mathew Beane]

For Magento, if using template files in a modman module, you must enable "Allow Symlinks"

I suggest adding the following to this statement:

For Magento, if using template files in a modman module, you must enable "Allow Symlinks" under system->configuration->advanced->developer.

This will make it much easier for people who may have not seen that setting before.

Thanks!