the current security policy for this is based on two points:
1) don't add gadgets to your lockscreen that you don't want on your lockscreen
2) see #1
future improvements here will probably add gadget info to show what risks a gadget
may incur when placed on the lockscreen
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a quick set of convenience functions for creating gadgets (desktop modules).
see gadget_test for an example. documentation still to come :)
i still need to comb over and make sure i didn't miss freeing anything...
SVN revision: 18742