Adjust preference_bundle templates to append preferenceloader dependency

[L1ghtmann]

What does this implement/fix? Explain your changes.

See title

Does this close any currently open issues?

Resolves #12

Any relevant logs, error output, etc?

Any other comments?

First instance:

Choose a Template (required): 9
Project Name (required): dd
Package Name [me.lightmann.dd]:
[iphone/preference_bundle] Class name prefix (three or more characters unique to this project) [XXX]:
**[iphone/preference_bundle] Added 'preferenceloader' dependency to /home/lightmann/tt2/control!**
Instantiating iphone/preference_bundle in dd/...
Adding 'dd' as an aggregate subproject in Theos makefile 'Makefile'.
Done.

Second:

Choose a Template (required): 9
Project Name (required): ddd
Package Name [me.lightmann.ddd]:
[iphone/preference_bundle] Class name prefix (three or more characters unique to this project) [XXX]:
**[iphone/preference_bundle] Note: 'preferenceloader' dependency already present or no 'Depends' line found!**
Instantiating iphone/preference_bundle in ddd/...
Adding 'ddd' as an aggregate subproject in Theos makefile 'Makefile'.
Done.

Where has this been tested?

Operating System: …

Platform: …

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