Possible gadget parsing optimization

[Jan Luehe]

Currently, when a GadgetSpec is constructed, all of a gadget's (possibly 
many) views are initialized (in the View constructor), which includes 
concatenating their Content sections and also parsing their 
PipelinedData tags.

Preferably, we should initialize a view only when it is requested (that 
is, the gadget's "current" view).

If there is an interest in this optimization, I will go ahead and 
prepare a patch.

Thanks,

Jan